Q: Is 20,787 a Prime Number?
A: No, 20,787 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 20787 can be evenly divided by 1 3 13 39 41 123 169 507 533 1,599 6,929 and 20,787, with no remainder.
Since 20,787 cannot be divided by just 1 and 20,787, it is not a prime number.