21793708 has 12 divisors (see below), whose sum is σ = 38440192. Its totient is φ = 10810800.

The previous prime is 21793699. The next prime is 21793721. The reversal of 21793708 is 80739712.

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, 20943 + ... + 21958.

Almost surely, 2^21793708 is an apocalyptic number.

It is an amenable number.

21793708 is a deficient number, since it is larger than the sum of its proper divisors (16646484).

21793708 is a wasteful number, since it uses less digits than its factorization.

21793708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43032 (or 43030 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 21793708 is about 4668.3731641761. The cubic root of 21793708 is about 279.3253656316.

The spelling of 21793708 in words is "twenty-one million, seven hundred ninety-three thousand, seven hundred eight".