2

The number two (2 in decimal form) is the third non negative integer/natural number, the second positive integer, and the number following 1 and preceding 3 on the number line. It is simple to picture two objects in an individual's head, but not as simple as picturing 1 or 0 objects.

Two is a unique integer (or real number, for that matter) in that any hyperoperation preformed on it, whether it be addition, multiplication, exponentiation, tetration, or any higher operation will always return 4|the same number.

Two is an important number in computing, due to the fact that the vast majority of computers work in binary or base two. It is also the first prime number, as well as the only even prime.