21880508 has 12 divisors (see below), whose sum is σ = 41236440. Its totient is φ = 10098672.

The previous prime is 21880493. The next prime is 21880531. The reversal of 21880508 is 80508812.

It is a congruent number.

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, 210338 + ... + 210441.

It is an arithmetic number, because the mean of its divisors is an integer number (3436370).

Almost surely, 2^21880508 is an apocalyptic number.

It is an amenable number.

21880508 is a deficient number, since it is larger than the sum of its proper divisors (19355932).

21880508 is a wasteful number, since it uses less digits than its factorization.

21880508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420796 (or 420794 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 21880508 is about 4677.6605263743. The cubic root of 21880508 is about 279.6957068407.

The spelling of 21880508 in words is "twenty-one million, eight hundred eighty thousand, five hundred eight".