Q: Is 18,221,840 a Composite Number?

Why is 18,221,840 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 18,221,840 can be evenly divided by 1 2 4 5 7 8 10 13 14 16 20 26 28 35 40 52 56 65 70 80 91 104 112 130 140 182 208 260 280 364 455 520 560 728 910 1,040 1,456 1,820 2,503 3,640 5,006 7,280 10,012 12,515 17,521 20,024 25,030 32,539 35,042 40,048 50,060 65,078 70,084 87,605 100,120 130,156 140,168 162,695 175,210 200,240 227,773 260,312 280,336 325,390 350,420 455,546 520,624 650,780 700,840 911,092 1,138,865 1,301,560 1,401,680 1,822,184 2,277,730 2,603,120 3,644,368 4,555,460 9,110,920 and 18,221,840, with no remainder.

Since 18,221,840 cannot be divided by just 1 and 18,221,840, 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).