21928876 has 12 divisors (see below), whose sum is σ = 38669400. Its totient is φ = 10880480.

The previous prime is 21928813. The next prime is 21928877. The reversal of 21928876 is 67882912.

It is not an unprimeable number, because it can be changed into a prime (21928877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20401 + ... + 21448.

It is an arithmetic number, because the mean of its divisors is an integer number (3222450).

Almost surely, 2^21928876 is an apocalyptic number.

It is an amenable number.

21928876 is a deficient number, since it is larger than the sum of its proper divisors (16740524).

21928876 is a wasteful number, since it uses less digits than its factorization.

21928876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41984 (or 41982 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 21928876 is about 4682.8277781699. The cubic root of 21928876 is about 279.9016491315.

The spelling of 21928876 in words is "twenty-one million, nine hundred twenty-eight thousand, eight hundred seventy-six".