Q: Is 18,438 a Prime Number?
A: No, 18,438 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 18438 can be evenly divided by 1 2 3 6 7 14 21 42 439 878 1,317 2,634 3,073 6,146 9,219 and 18,438, with no remainder.
Since 18,438 cannot be divided by just 1 and 18,438, it is not a prime number.