21925984 has 24 divisors (see below), whose sum is σ = 43303680. Its totient is φ = 10928256.

The previous prime is 21925979. The next prime is 21925987. The reversal of 21925984 is 48952912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21925987) 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, 11362 + ... + 13150.

It is an arithmetic number, because the mean of its divisors is an integer number (1804320).

Almost surely, 2^21925984 is an apocalyptic number.

It is an amenable number.

21925984 is a deficient number, since it is larger than the sum of its proper divisors (21377696).

21925984 is a wasteful number, since it uses less digits than its factorization.

21925984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182 (or 2174 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 21925984 is about 4682.5189802071. The cubic root of 21925984 is about 279.8893440296.

The spelling of 21925984 in words is "twenty-one million, nine hundred twenty-five thousand, nine hundred eighty-four".