Q: Is 21,720,036 a Composite Number?

Why is 21,720,036 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 21,720,036 can be evenly divided by 1 2 3 4 6 12 13 26 37 39 52 53 71 74 78 106 111 142 148 156 159 212 213 222 284 318 426 444 481 636 689 852 923 962 1,378 1,443 1,846 1,924 1,961 2,067 2,627 2,756 2,769 2,886 3,692 3,763 3,922 4,134 5,254 5,538 5,772 5,883 7,526 7,844 7,881 8,268 10,508 11,076 11,289 11,766 15,052 15,762 22,578 23,532 25,493 31,524 34,151 45,156 48,919 50,986 68,302 76,479 97,838 101,972 102,453 136,604 139,231 146,757 152,958 195,676 204,906 278,462 293,514 305,916 409,812 417,693 556,924 587,028 835,386 1,670,772 1,810,003 3,620,006 5,430,009 7,240,012 10,860,018 and 21,720,036, with no remainder.

Since 21,720,036 cannot be divided by just 1 and 21,720,036, it is a composite number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).