Q: Is 21,618,450 a Composite Number?

Why is 21,618,450 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 21,618,450 can be evenly divided by 1 2 3 5 6 7 9 10 14 15 18 21 25 30 35 42 45 50 63 70 75 90 105 126 150 175 210 225 315 350 450 525 630 1,050 1,575 3,150 6,863 13,726 20,589 34,315 41,178 48,041 61,767 68,630 96,082 102,945 123,534 144,123 171,575 205,890 240,205 288,246 308,835 343,150 432,369 480,410 514,725 617,670 720,615 864,738 1,029,450 1,201,025 1,441,230 1,544,175 2,161,845 2,402,050 3,088,350 3,603,075 4,323,690 7,206,150 10,809,225 and 21,618,450, with no remainder.

Since 21,618,450 cannot be divided by just 1 and 21,618,450, 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).