Q: Is 20,405,550 a Composite Number?

Why is 20,405,550 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 20,405,550 can be evenly divided by 1 2 3 5 6 10 11 15 22 25 30 33 50 55 66 75 83 110 149 150 165 166 249 275 298 330 415 447 498 550 745 825 830 894 913 1,245 1,490 1,639 1,650 1,826 2,075 2,235 2,490 2,739 3,278 3,725 4,150 4,470 4,565 4,917 5,478 6,225 7,450 8,195 9,130 9,834 11,175 12,367 12,450 13,695 16,390 22,350 22,825 24,585 24,734 27,390 37,101 40,975 45,650 49,170 61,835 68,475 74,202 81,950 122,925 123,670 136,037 136,950 185,505 245,850 272,074 309,175 371,010 408,111 618,350 680,185 816,222 927,525 1,360,370 1,855,050 2,040,555 3,400,925 4,081,110 6,801,850 10,202,775 and 20,405,550, with no remainder.

Since 20,405,550 cannot be divided by just 1 and 20,405,550, 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).