Q: Is 20,145 a Prime Number?
A: No, 20,145 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 20145 can be evenly divided by 1 3 5 15 17 51 79 85 237 255 395 1,185 1,343 4,029 6,715 and 20,145, with no remainder.
Since 20,145 cannot be divided by just 1 and 20,145, it is not a prime number.