Q: Is 18,009 a Prime Number?
A: No, 18,009 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 18009 can be evenly divided by 1 3 9 23 27 29 69 87 207 261 621 667 783 2,001 6,003 and 18,009, with no remainder.
Since 18,009 cannot be divided by just 1 and 18,009, it is not a prime number.