  2 (two; ) is a number, numeral, and glyph. it is the natural number following 1 and preceding 3. ==in mathematics== the number two has many properties in mathematics.wells, d. the penguin dictionary of curious and interesting numbers london: penguin group. (1987): 41â44 an integer is called even if it is divisible by 2. for integers written in a numeral system based on an even number, such as decimal and hexadecimal, divisibility by 2 is easily tested by merely looking at the last digit. if it is even, then the whole number is even. in particular, when written in the decimal system, all multiples of 2 will end in 0, 2, 4, 6, or 8. two is the smallest and the first prime number, and the only even prime number bryan bunch, the kingdom of infinite number. new york: w. h. freeman & company (2000): 31 (for this reason it is sometimes called "the oddest prime").john horton conway & richard k. guy, the book of numbers. new york: springer (1996): 25. isbn 0-387-97993-x. "two is celebrated as the only even prime, which in some sense makes it the oddest prime of all." the next prime is three. two and three are the only two consecutive prime numbers. 2 is the first sophie germain prime, the first factorial prime, the first lucas prime, the first ramanujan prime, and the first smarandache-wellin prime. it is an eisenstein prime with no imaginary part and real part of the form 3n - 1. it
2_(number) Integers