Q: Is 18,428 a Prime Number?
A: No, 18,428 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 18428 can be evenly divided by 1 2 4 17 34 68 271 542 1,084 4,607 9,214 and 18,428, with no remainder.
Since 18,428 cannot be divided by just 1 and 18,428, it is not a prime number.