21880512 has 42 divisors (see below), whose sum is σ = 62718188. Its totient is φ = 7293312.

The previous prime is 21880493. The next prime is 21880531. The reversal of 21880512 is 21508812.

It is an interprime number because it is at equal distance from previous prime (21880493) and next prime (21880531).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18418 + ... + 19569.

Almost surely, 2^21880512 is an apocalyptic number.

It is an amenable number.

21880512 is an abundant number, since it is smaller than the sum of its proper divisors (40837676).

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

21880512 is a wasteful number, since it uses less digits than its factorization.

21880512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38005 (or 37992 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 21880512 is about 4677.6609539384. The cubic root of 21880512 is about 279.6957238846.

The spelling of 21880512 in words is "twenty-one million, eight hundred eighty thousand, five hundred twelve".