Q: Is 21,040,020 a Composite Number?

Why is 21,040,020 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 21,040,020 can be evenly divided by 1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 45 47 54 60 90 94 108 135 141 180 188 235 270 282 423 470 540 564 705 829 846 940 1,269 1,410 1,658 1,692 2,115 2,487 2,538 2,820 3,316 4,145 4,230 4,974 5,076 6,345 7,461 8,290 8,460 9,948 12,435 12,690 14,922 16,580 22,383 24,870 25,380 29,844 37,305 38,963 44,766 49,740 74,610 77,926 89,532 111,915 116,889 149,220 155,852 194,815 223,830 233,778 350,667 389,630 447,660 467,556 584,445 701,334 779,260 1,052,001 1,168,890 1,402,668 1,753,335 2,104,002 2,337,780 3,506,670 4,208,004 5,260,005 7,013,340 10,520,010 and 21,040,020, with no remainder.

Since 21,040,020 cannot be divided by just 1 and 21,040,020, 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).