Q: Is 20,502,405 a Composite Number?

Why is 20,502,405 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 20,502,405 can be evenly divided by 1 3 5 7 9 11 15 21 33 35 45 55 61 63 77 97 99 105 165 183 231 291 305 315 385 427 485 495 549 671 679 693 873 915 1,067 1,155 1,281 1,455 2,013 2,037 2,135 2,745 3,201 3,355 3,395 3,465 3,843 4,365 4,697 5,335 5,917 6,039 6,111 6,405 7,469 9,603 10,065 10,185 14,091 16,005 17,751 19,215 22,407 23,485 29,585 30,195 30,555 37,345 41,419 42,273 48,015 53,253 65,087 67,221 70,455 88,755 112,035 124,257 195,261 207,095 211,365 266,265 325,435 336,105 372,771 455,609 585,783 621,285 976,305 1,366,827 1,863,855 2,278,045 2,928,915 4,100,481 6,834,135 and 20,502,405, with no remainder.

Since 20,502,405 cannot be divided by just 1 and 20,502,405, 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).