21606792 has 16 divisors (see below), whose sum is σ = 54017040. Its totient is φ = 7202256.

The previous prime is 21606787. The next prime is 21606817. The reversal of 21606792 is 29760612.

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, 450118 + ... + 450165.

It is an arithmetic number, because the mean of its divisors is an integer number (3376065).

Almost surely, 2^21606792 is an apocalyptic number.

It is an amenable number.

21606792 is an abundant number, since it is smaller than the sum of its proper divisors (32410248).

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

21606792 is a wasteful number, since it uses less digits than its factorization.

21606792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900292 (or 900288 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 21606792 is about 4648.3106608746. The cubic root of 21606792 is about 278.5245173942.

The spelling of 21606792 in words is "twenty-one million, six hundred six thousand, seven hundred ninety-two".