21607682 has 16 divisors (see below), whose sum is σ = 33696000. Its totient is φ = 10380720.

The previous prime is 21607679. The next prime is 21607709. The reversal of 21607682 is 28670612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8069 + ... + 10407.

It is an arithmetic number, because the mean of its divisors is an integer number (2106000).

Almost surely, 2^21607682 is an apocalyptic number.

21607682 is a deficient number, since it is larger than the sum of its proper divisors (12088318).

21607682 is a wasteful number, since it uses less digits than its factorization.

21607682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 21607682 is about 4648.4063935934. The cubic root of 21607682 is about 278.5283415530.

The spelling of 21607682 in words is "twenty-one million, six hundred seven thousand, six hundred eighty-two".