Q: Is 20,979 a Prime Number?
A: No, 20,979 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 20979 can be evenly divided by 1 3 7 9 21 27 37 63 81 111 189 259 333 567 777 999 2,331 2,997 6,993 and 20,979, with no remainder.
Since 20,979 cannot be divided by just 1 and 20,979, it is not a prime number.