Q: Is 20,478,540 a Composite Number?

Why is 20,478,540 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 20,478,540 can be evenly divided by 1 2 3 4 5 6 10 12 15 17 20 30 34 51 60 68 85 102 170 204 255 289 340 510 578 867 1,020 1,156 1,181 1,445 1,734 2,362 2,890 3,468 3,543 4,335 4,724 5,780 5,905 7,086 8,670 11,810 14,172 17,340 17,715 20,077 23,620 35,430 40,154 60,231 70,860 80,308 100,385 120,462 200,770 240,924 301,155 341,309 401,540 602,310 682,618 1,023,927 1,204,620 1,365,236 1,706,545 2,047,854 3,413,090 4,095,708 5,119,635 6,826,180 10,239,270 and 20,478,540, with no remainder.

Since 20,478,540 cannot be divided by just 1 and 20,478,540, 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).