21924332 has 6 divisors (see below), whose sum is σ = 38367588. Its totient is φ = 10962164.

The previous prime is 21924323. The next prime is 21924337. The reversal of 21924332 is 23342912.

It is not an unprimeable number, because it can be changed into a prime (21924337) by changing a digit.

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 as a sum of consecutive naturals, namely, 2740538 + ... + 2740545.

It is an arithmetic number, because the mean of its divisors is an integer number (6394598).

Almost surely, 2^21924332 is an apocalyptic number.

It is an amenable number.

21924332 is a deficient number, since it is larger than the sum of its proper divisors (16443256).

21924332 is a wasteful number, since it uses less digits than its factorization.

21924332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481087 (or 5481085 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

The square root of 21924332 is about 4682.3425761044. The cubic root of 21924332 is about 279.8823144887.

The spelling of 21924332 in words is "twenty-one million, nine hundred twenty-four thousand, three hundred thirty-two".