Twenty three

23 is an odd number.

23 is a prime number, which means it is only divisible by 1 and itself.

23 is a Sophie Germain prime, which means that 2 x 23 + 1 = 47 is also a prime number.

In binary, 23 is represented as 10111.

In hex, 23 is represented as 17.

Prime factorization of 23: 23.