Q: Is 1,818,820 a Prime Number?
A: No, 1,818,820 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 1818820 can be evenly divided by 1 2 4 5 10 20 211 422 431 844 862 1,055 1,724 2,110 2,155 4,220 4,310 8,620 90,941 181,882 363,764 454,705 909,410 and 1,818,820, with no remainder.
Since 1,818,820 cannot be divided by just 1 and 1,818,820, it is not a prime number.