Q: Is 20,740 a Prime Number?
A: No, 20,740 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 20740 can be evenly divided by 1 2 4 5 10 17 20 34 61 68 85 122 170 244 305 340 610 1,037 1,220 2,074 4,148 5,185 10,370 and 20,740, with no remainder.
Since 20,740 cannot be divided by just 1 and 20,740, it is not a prime number.