21983080 has 32 divisors (see below), whose sum is σ = 56528640. Its totient is φ = 7536960.

The previous prime is 21983077. The next prime is 21983107. The reversal of 21983080 is 8038912.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38976 + ... + 39535.

It is an arithmetic number, because the mean of its divisors is an integer number (1766520).

Almost surely, 2^21983080 is an apocalyptic number.

21983080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21983080 is an abundant number, since it is smaller than the sum of its proper divisors (34545560).

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

21983080 is a wasteful number, since it uses less digits than its factorization.

21983080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78529 (or 78525 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 21983080 is about 4688.6117348315. The cubic root of 21983080 is about 280.1320805428.

The spelling of 21983080 in words is "twenty-one million, nine hundred eighty-three thousand, eighty".