2000 (عدد)

2000 (عدد) یعنی 2000 ایک عدد اور ایک علامت ہے۔ کچھ عددی نظاموں میں 1999 سے بڑا یا زیادہ اور 2001 سے چھوٹا یا کم ہوتا ہے۔ گنتی میں اسے دو ہزار یا بیس سو بولا جاتا ہے۔ اور اس سے پہلے ایک ہزار نو سو نینانوے یا انیس سو نینانوے اور اس کے بعد دو ہزار ایک یا بیس سو ایک بولا جاتا ہے۔ 

 انفرادی خصوصیات 

 عمومی خصوصیات 
 تیسرے ہزارے (2001 تا 2999) کے خاص اعداد 
 2001 (عدد) – sphenic number
 2003 (عدد) – Sophie Germain prime and the smallest prime number in 2000's
 2005 (عدد) – A vertically symmetric number
 2009 (عدد) – 
 2011 (عدد) – Sexy prime number. Also, sum of eleven consecutive primes: 2011=157+163+167+173+179+181+191+193+197+199+211.
 2015 (عدد) – Lucas–Carmichael number
 2016 (عدد) – triangular number, number of 5-cubes in a 9-cube
 2017 (عدد) – Mertens function zero. (2011, 2017) is a sexy prime pair.
 2020 (عدد) – sum of the totient function for the first 81 integers
 2024 (عدد) – tetrahedral number
 2025 (عدد) – 452, sum of the cubes of the first nine integers, centered octagonal number
 2027 (عدد) – safe prime
 2029 (عدد) – member of the Mian–Chowla sequence
 2030 (عدد) – =
 2031 (عدد) – centered pentagonal number
 2039 (عدد) – Sophie Germain prime, safe prime
 2047 (عدد) – super-Poulet number, Woodall number, decagonal number. Also, 2047 = 211 − 1 = 23 × 89 and is the first مرسن مفرد عدد that is composite for a prime exponent.
 2048 (عدد) – power of two
 2056 (عدد) – magic constant of n×n normal جادوئی خانے and n-queens problem for n = 16.
 2060 (عدد) – sum of the totient function for the first 82 integers
 2063 (عدد) – Sophie Germain prime, safe prime
 2069 (عدد) – Sophie Germain prime
 2070 (عدد) – pronic number
 2080 (عدد) – triangular number
 2093 (عدد) – Mertens function zero
 2095 (عدد) – Mertens function zero
 2096 (عدد) – Mertens function zero
 2097 (عدد) – Mertens function zero
 2099 (عدد) – Mertens function zero, safe prime, highly cototient number
 2100 (عدد) – Mertens function zero
 2101 (عدد) – centered heptagonal number
 2107 (عدد) – member of a Ruth–Aaron pair with 2108 (first definition)
 2108 (عدد) – member of a Ruth–Aaron pair with 2107 (first definition)
 2109 (عدد) – square pyramidal number
 2112 (عدد) – The break-through album of the band Rush
 2113 (عدد) – Mertens function zero, Proth prime, centered square number
 2116 (عدد) – 462
 2117 (عدد) – Mertens function zero
 2119 (عدد) – Mertens function zero
 2120 (عدد) – Mertens function zero
 2122 (عدد) – Mertens function zero
 2125 (عدد) – nonagonal number
 2127 (عدد) – sum of the first 34 primes
 2129 (عدد) – Sophie Germain prime
 2135 (عدد) – Mertens function zero
 2136 (عدد) – Mertens function zero
 2138 (عدد) – Mertens function zero
 2141 (عدد) – Sophie Germain prime
 2142 (عدد) – sum of the totient function for the first 83 integers
 2143 (عدد) – almost exactly 22π4
 2145 (عدد) – triangular number
 2162 (عدد) – pronic number
 2166 (عدد) – sum of the totient function for the first 84 integers
 2169 (عدد) – Leyland number
 2171 (عدد) – Mertens function zero
 2172 (عدد) – Mertens function zero
 2178 (عدد) – reverses when multiplied by 4
 2175 (عدد) – smallest number requiring 143 seventh powers for Waring representation
 2176 (عدد) – pentagonal pyramidal number, centered pentagonal number
 2179 (عدد) – Wedderburn–Etherington number
 2187 (عدد) – 37, vampire number, perfect totient number
 2188 (عدد) – Motzkin number
 2197 (عدد) – 13^3, palindromic in base 12 (133112)
 2199 (عدد) – perfect totient number
 2201 (عدد) – only known non-palindromic number whose مکعب is palindromic; also no known fourth or higher powers are palindromic for non-palindromic numbers
 2205 (عدد) – odd زائد عدد
 2207 (عدد) – safe prime, Lucas prime
 2208 (عدد) – Keith number
 2209 (عدد) – 472, palindromic in base 14 (B3B14), centered octagonal number
 2211 (عدد) – triangular number
 2222 (عدد) – repdigit
 2223 (عدد) – Kaprekar number
 2230 (عدد) – sum of the totient function for the first 85 integers
 2232 (عدد) – decagonal number
 2245 (عدد) – centered square number
 2254 (عدد) – member of the Mian–Chowla sequence
 2255 (عدد) – octahedral number
 2256 (عدد) – pronic number
 2269 (عدد) – cuban prime
 2272 (عدد) – sum of the totient function for the first 86 integers
 2273 (عدد) – Sophie Germain prime
 2276 (عدد) – sum of the first 35 primes, centered heptagonal number
 2278 (عدد) – triangular number
 2287 (عدد) – balanced prime
 2294 (عدد) – Mertens function zero
 2295 (عدد) – Mertens function zero
 2296 (عدد) – Mertens function zero
 2299 (عدد) – member of a Ruth–Aaron pair with 2300 (first definition)
 2300 (عدد) – tetrahedral number, member of a Ruth–Aaron pair with 2299 (first definition)
 2301 (عدد) – nonagonal number
 2304 (عدد) – 482
 2306 (عدد) – Mertens function zero
 2309 (عدد) – primorial prime, Mertens function zero, highly cototient number
 2310 (عدد) – fifth primorial
 2311 (عدد) – primorial prime
 2321 (عدد) – Mertens function zero
 2322 (عدد) – Mertens function zero
 2326 (عدد) – centered pentagonal number
 2328 (عدد) – sum of the totient function for the first 87 integers, the number of groups of order 128, see .
 2331 (عدد) – centered cube number
 2338 (عدد) – Mertens function zero
 2339 (عدد) – Sophie Germain prime
 2346 (عدد) – triangular number
 2351 (عدد) – Sophie Germain prime
 2352 (عدد) – pronic number
 2357 (عدد) – Smarandache–Wellin prime
 2368 (عدد) – sum of the totient function for the first 88 integers
 2378 (عدد) – Pell number
 2379 (عدد) – member of the Mian–Chowla sequence
 2381 (عدد) – centered square number
 2393 (عدد) – Sophie Germain prime
 2397 (عدد) – sum of the squares of the first ten primes
 2399 (عدد) – Sophie Germain prime
 2400 (عدد) – perfect score on ایس اے ٹی tests administered after 2005
 2401 (عدد) – 74, 492, centered octagonal number
 2415 (عدد) – triangular number
 2417 (عدد) – balanced prime
 2425 (عدد) – decagonal number
 2427 (عدد) – sum of the first 36 primes
 2431 (عدد) – product of three consecutive primes
 2437 (عدد) – cuban prime
 2447 (عدد) – safe prime
 2450 (عدد) – pronic number
 2456 (عدد) – sum of the totient function for the first 89 integers
 2458 (عدد) – centered heptagonal number
 2459 (عدد) – Sophie Germain prime, safe prime
 2465 (عدد) – magic constant of n×n normal جادوئی خانے and n-queens problem for n = 17, Carmichael number
 2470 (عدد) – square pyramidal number
 2480 (عدد) – sum of the totient function for the first 90 integers
 2481 (عدد) – centered pentagonal number
 2484 (عدد) – nonagonal number
 2485 (عدد) – triangular number
 2491 (عدد) – member of Ruth–Aaron pair with 2492 under second definition
 2492 (عدد) – member of Ruth–Aaron pair with 2491 under second definition
 2500 (عدد) – 502, palindromic in base 7 (102017
 2501 (عدد) – Mertens function zero
 2502 (عدد) – Mertens function zero
 2510 (عدد) – member of the Mian–Chowla sequence
 2513 (عدد) – member of the Padovan sequence
 2517 (عدد) – Mertens function zero
 2519 (عدد) – the smallest number congruent to 1 (mod 2), 2 (mod 3), 3 (mod 4), ..., 9 (mod 10)
 2520 – superior highly composite number; smallest number divisible by numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 12 ; colossally abundant number; Harshad number in several bases. It is also the highest number with more divisors than any number less than double itself. Not only is it the 7th (and last) number with more divisors than any number double itself but it also the 7th number that is highly composite and the lowest common multiple of a consecutive set of integers from 1  which is a property the previous number with this pattern of divisors does not have (360). That is, although 360 and 2520 both have more divisors than any number twice themselves, 2520 is the lowest number divisible by both 1 to 9 and 1 to 10, whereas 360 is not the lowest number divisible by 1 to 6 (which 60 is) and is not divisible by 1 to 7 (which 420 is). It is also the 6th and largest highly composite number that is a divisor of every higher highly composite number.
 2521 (عدد) – centered square number
 2522 (عدد) – Mertens function zero
 2523 (عدد) – Mertens function zero
 2524 (عدد) – Mertens function zero
 2525 (عدد) – Mertens function zero
 2530 (عدد) – Mertens function zero, Leyland number
 2533 (عدد) – Mertens function zero
 2537 (عدد) – Mertens function zero
 2538 (عدد) – Mertens function zero
 2543 (عدد) – Sophie Germain prime
 2549 (عدد) – Sophie Germain prime
 2550 (عدد) – pronic number
 2552 (عدد) – sum of the totient function for the first 91 integers
 2556 (عدد) – triangular number
 2567 (عدد) – Mertens function zero
 2568 (عدد) – Mertens function zero. Also number of digits in the معید اعشاریہ expansion of 1000!, or the product of all قدرتی عددs from 1 to 1000.
 2570 (عدد) – Mertens function zero
 2579 (عدد) – safe prime
 2580 (عدد) – Keith number
 2584 (عدد) – Fibonacci number, sum of the first 37 primes
 2596 (عدد) – sum of the totient function for the first 92 integers
 2600 (عدد) – tetrahedral number, member of a Ruth–Aaron pair with 2601 (first definition)
 * 2600 Hz is the tone used by a blue box to defeat toll charges on long distance telephone calls.
 * 2600: The Hacker Quarterly is a magazine named after the above.
 * The Atari 2600 was a popular video game console.
 2601 (عدد) – 512, member of a Ruth–Aaron pair with 2600 (first definition)
 2620 (عدد) – محبانہ عدد with 2924
 2626 (عدد) – decagonal number
 2628 (عدد) – triangular number
 2632 (عدد) – number of consecutive baseball games played by Cal Ripken, Jr.
 2641 (عدد) – centered pentagonal number
 2647 (عدد) – centered heptagonal number
 2652 (عدد) – pronic number
 2656 (عدد) – sum of the totient function for the first 93 integers
 2665 (عدد) – centered square number
 2674 (عدد) – nonagonal number
 2677 (عدد) – balanced prime
 2680 (عدد) – number of 11-queens problem solutions
 2689 (عدد) – Mertens function zero, Proth prime
 2693 (عدد) – Sophie Germain prime
 2699 (عدد) – Sophie Germain prime
 2701 (عدد) – triangular number, super-Poulet number
 2702 (عدد) – sum of the totient function for the first 94 integers
 2704 (عدد) – 522
  – largest known odd number which cannot be expressed in the form x2 + y2 + 10z2 where x, y and z are integers. In 1997 it was conjectured that this is also the largest such odd number.   It is now known this is true if the generalized Riemann hypothesis is true.  
 2728 (عدد) – Kaprekar number
 2729 (عدد) – highly cototient number
 2731 (عدد) – Wagstaff prime
 2736 (عدد) – octahedral number
 2741 (عدد) – Sophie Germain prime
 2744 (عدد) – 143, palindromic in base 13 (133113)
 2747 (عدد) – sum of the first 38 primes
 2753 (عدد) – Sophie Germain prime, Proth prime
 2756 (عدد) – pronic number
 2774 (عدد) – sum of the totient function for the first 95 integers
 2775 (عدد) – triangular number
 2780 (عدد) – member of the Mian–Chowla sequence
 2783 (عدد) – member of a Ruth–Aaron pair with 2784 (first definition)
 2784 (عدد) – member of a Ruth–Aaron pair with 2783 (first definition)
 2791 (عدد) – cuban prime
 2801 (عدد) - first base 7 repunit prime
 2806 (عدد) – centered pentagonal number, sum of the totient function for the first 96 integers
 2809 (عدد) – 532, centered octagonal number
 2813 (عدد) – centered square number
 2819 (عدد) – Sophie Germain prime, safe prime
 2821 (عدد) – Carmichael number
 2835 (عدد) – odd abundant number, decagonal number
 2843 (عدد) – centered heptagonal prime
 2850 (عدد) – triangular number
 2862 (عدد) – pronic number
 2870 (عدد) – square pyramidal number
 2871 (عدد) – nonagonal number
 2872 (عدد) – tetranacci number
 2879 (عدد) – safe prime
 2897 (عدد) – Markov number
 2902 (عدد) – sum of the totient function for the first 97 integers
 2903 (عدد) – Sophie Germain prime, safe prime, balanced prime
 2914 (عدد) – sum of the first 39 primes
 2915 (عدد) – Lucas–Carmichael number
 2916 (عدد) – 542
 2924 (عدد) – amicable number with 2620
 2925 (عدد) – magic constant of n×n normal جادوئی خانے and n-queens problem for n = 18, tetrahedral number, member of the Mian-Chowla sequence
 2926 (عدد) – triangular number
 2939 (عدد) – Sophie Germain prime
 2944 (عدد) – sum of the totient function for the first 98 integers
 2963 (عدد) – Sophie Germain prime, safe prime, balanced prime
 2965 (عدد) – greater of second pair of Smith brothers, centered square number
 2969 (عدد) – Sophie Germain prime
 2970 (عدد) – harmonic divisor number, pronic number
 2976 (عدد) – centered pentagonal number
 2997 (عدد) – chiliagonal number
 2999 (عدد) – safe prime

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