20000 (عدد)

**20000 (عدد)** یعنی 20,000 (عدد) ایک عدد اور ایک علامت ہے۔ کچھ عددی نظاموں میں 19,999 سے بڑا یا زیادہ اور 20,001 سے چھوٹا یا کم ہوتا ہے۔ گنتی میں اسے بیس ہزار بولا جاتا ہے۔ اور اس سے پہلے انیس ہزار نو سو نینانوے اور اس کے بعد بیس ہزار ایک بولا جاتا ہے۔

## 20000 تا 29999 کے خاص اعداد
* **20000** – round number; also in the title of جولس ورن's novel *[[Twenty Thousand Leagues Under the Sea|20,000 Leagues Under The Sea]]*
* **20081** – Motorola 68K instruction for no operation (NOP)
* **20100** – sum of the first 200 natural numbers (hence a triangular number)
* **20160** – highly composite number; the smallest order belonging to two non-isomorphic simple groups: the alternating group A8 and the Chevalley group *A*2(4)
* **20161** – the largest integer that cannot be expressed as a sum of two زائد عددs
* **20230** – pentagonal pyramidal number
* **20412** – Leyland number
* **20540** – square pyramidal number
* **20569** – tetranacci number
* **20736** – 124, 10000<sub>12</sub>, palindromic in base 15 (622615)
* **20903** – first prime of form 120*k*+23 that is *not* a full reptend prime
* **21025** – 1452, palindromic in base 12 (10201<sub>12</sub>
* **21147** – Bell number
* **21181** – one of six remaining Seventeen or Bust numbers in the Sierpinski problem
* **21856** – octahedral number
* **21952** – 283
* **21978** – reverses when multiplied by 4
* **22050** – pentagonal pyramidal number
* **22140** – square pyramidal number
* **22222** – Kaprekar number
* **22447** – cuban prime
* **22527** – Woodall number
* **22699** – one of six remaining Seventeen or Bust numbers in the Sierpinski problem
* **23401** – Leyland number
* **23409** – sum of the cubes of the first 17 positive integers
* **23497** – cuban prime
* **23821** – square pyramidal number
* **23969** – octahedral number
* **23976** – pentagonal pyramidal number
* **24211** – Zeisel number
* **24336** – 1562, palindromic in base 5: 12343215
* **24389** – 293
* **24571** – cuban prime
* **24601** – Jean Valjean's prisoner number in بدنصیب (ناول)
* **24631** – Wedderburn-Etherington number
* **24649** – 1572, palindromic in base 12: 1232112
* **24737** – one of six remaining Seventeen or Bust numbers in the Sierpinski problem
* **25011** – the first composite number that in base 10 remains composite after any insertion of a digit
* **25085** – Zeisel number
* **25117** – cuban prime
* **25200** – highly composite number
* **25205** – largest number whose factorial is less than 10100000
* **25585** – square pyramidal number
* **26214** – octahedral number
* **26227** – cuban prime
* **26861** – smallest number below which there are more primes of the form 4k + 1 than of the form 4k + 3
* **26896** – 1642, palindromic in base 9: 408049
* **27000** – 303
* **27434** – square pyramidal number
* **27559** – Zeisel number
* **27648** – 11*22*33*44
* **27720** – highly composite number; smallest number divisible by the numbers 1 to 12 (there is no smaller number divisible by the numbers 1 to 11)
* **27846** – harmonic divisor number
* **28158** – pentagonal pyramidal number
* **28374** – smallest integer to start a run of six consecutive integers with the same number of divisors
* **28561** – 134, 1192 + 1202, number that is simultaneously a square number and a centered square number, palindromic in base 12: 1464112
* **28595** – octahedral number
* **28657** – Fibonacci number, Markov number
* **28900** – 1702, palindromic in base 13: 1020113
* **29241** – sum of the cubes of the first 18 positive integers
* **29341** – Carmichael number
* **29370** – square pyramidal number
* **29791** – 313

## حوالہ جات

زمرہ:ابتدائی حساب
زمرہ:صحیح اعداد
زمرہ:ویکی ڈیٹا سے مختلف مختصر وضاحت