Q: Is 20,748 a Prime Number?
A: No, 20,748 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 20748 can be evenly divided by 1 2 3 4 6 7 12 13 14 19 21 26 28 38 39 42 52 57 76 78 84 91 114 133 156 182 228 247 266 273 364 399 494 532 546 741 798 988 1,092 1,482 1,596 1,729 2,964 3,458 5,187 6,916 10,374 and 20,748, with no remainder.
Since 20,748 cannot be divided by just 1 and 20,748, it is not a prime number.