hnjon hnjon Yes 0 is an integer because it does not have a fractional part or component. ... Zero is a real number and it can be written as a rational number as in 0 = 0/3. Zero is an even integer because 0+1=1 is odd and 0+2=2 is even. But zero is not the smallest prime number because 0/1 is 0 but 0/0 is indeterminate.