Q: Is 21,180 a Prime Number?
A: No, 21,180 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 21180 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 60 353 706 1,059 1,412 1,765 2,118 3,530 4,236 5,295 7,060 10,590 and 21,180, with no remainder.
Since 21,180 cannot be divided by just 1 and 21,180, it is not a prime number.