-10 is an even number.
-10 is a Harshad number, which means it is divisible by the sum of its digits (1 + 0 = 1, and -10 is divisible by 1).
In binary, -10 is represented as 1111111111111111111111111111111111111111111111111111111111110110.
In hex, -10 is represented as fffffffffffffff6.