21995932 has 12 divisors (see below), whose sum is σ = 43991920. Its totient is φ = 9426816.

The previous prime is 21995921. The next prime is 21995951. The reversal of 21995932 is 23959912.

21995932 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 392757 + ... + 392812.

Almost surely, 2^21995932 is an apocalyptic number.

It is an amenable number.

21995932 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21995932 is a wasteful number, since it uses less digits than its factorization.

21995932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785580 (or 785578 counting only the distinct ones).

The product of its digits is 43740, while the sum is 40.

The square root of 21995932 is about 4689.9820895180. The cubic root of 21995932 is about 280.1866612494.

The spelling of 21995932 in words is "twenty-one million, nine hundred ninety-five thousand, nine hundred thirty-two".