21692968 has 16 divisors (see below), whose sum is σ = 44372160. Its totient is φ = 9860400.

The previous prime is 21692959. The next prime is 21692971. The reversal of 21692968 is 86929612.

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, 123168 + ... + 123343.

It is an arithmetic number, because the mean of its divisors is an integer number (2773260).

Almost surely, 2^21692968 is an apocalyptic number.

It is an amenable number.

21692968 is an abundant number, since it is smaller than the sum of its proper divisors (22679192).

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

21692968 is a wasteful number, since it uses less digits than its factorization.

21692968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246528 (or 246524 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 21692968 is about 4657.5710407894. The cubic root of 21692968 is about 278.8943129889.

The spelling of 21692968 in words is "twenty-one million, six hundred ninety-two thousand, nine hundred sixty-eight".