21980876 has 12 divisors (see below), whose sum is σ = 38703672. Its totient is φ = 10922688.

The previous prime is 21980857. The next prime is 21980897. The reversal of 21980876 is 67808912.

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, 16205 + ... + 17508.

It is an arithmetic number, because the mean of its divisors is an integer number (3225306).

Almost surely, 2^21980876 is an apocalyptic number.

It is an amenable number.

21980876 is a deficient number, since it is larger than the sum of its proper divisors (16722796).

21980876 is a wasteful number, since it uses less digits than its factorization.

21980876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33880 (or 33878 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 21980876 is about 4688.3766913506. The cubic root of 21980876 is about 280.1227183160.

The spelling of 21980876 in words is "twenty-one million, nine hundred eighty thousand, eight hundred seventy-six".