21930632 has 16 divisors (see below), whose sum is σ = 41170140. Its totient is φ = 10951936.

The previous prime is 21930619. The next prime is 21930647. The reversal of 21930632 is 23603912.

It can be written as a sum of positive squares in 2 ways, for example, as 18783556 + 3147076 = 4334^2 + 1774^2 .

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, 10508 + ... + 12420.

Almost surely, 2^21930632 is an apocalyptic number.

It is an amenable number.

21930632 is a deficient number, since it is larger than the sum of its proper divisors (19239508).

21930632 is a wasteful number, since it uses less digits than its factorization.

21930632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352 (or 3348 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 21930632 is about 4683.0152679657. The cubic root of 21930632 is about 279.9091201661.

The spelling of 21930632 in words is "twenty-one million, nine hundred thirty thousand, six hundred thirty-two".