There are several prime numbers, composite numbers, odd numbers and even numbers in the factor of 18
18: 1,2,3,6,9,18
Prime number; 2,3
Total: 6,9,18
Odd number: 1,3,9
Even number: 2,6,18
18: 1,2,3,6,9,18
Prime number; 2,3
Total: 6,9,18
Odd number: 1,3,9
Even number: 2,6,18