Q: Is 1,820 a Prime Number?
A: No, 1,820 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 1820 can be evenly divided by 1 2 4 5 7 10 13 14 20 26 28 35 52 65 70 91 130 140 182 260 364 455 910 and 1,820, with no remainder.
Since 1,820 cannot be divided by just 1 and 1,820, it is not a prime number.