20463980 has 12 divisors (see below), whose sum is σ = 42974400. Its totient is φ = 8185584.

The previous prime is 20463979. The next prime is 20464009. The reversal of 20463980 is 8936402.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511580 + ... + 511619.

It is an arithmetic number, because the mean of its divisors is an integer number (3581200).

Almost surely, 2^20463980 is an apocalyptic number.

20463980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20463980 is an abundant number, since it is smaller than the sum of its proper divisors (22510420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20463980 is a wasteful number, since it uses less digits than its factorization.

20463980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023208 (or 1023206 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20463980 is about 4523.7130766661. The cubic root of 20463980 is about 273.5247948003.

The spelling of 20463980 in words is "twenty million, four hundred sixty-three thousand, nine hundred eighty".