21966704 has 20 divisors (see below), whose sum is σ = 42634920. Its totient is φ = 10964160.

The previous prime is 21966691. The next prime is 21966727. The reversal of 21966704 is 40766912.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 14327 + ... + 15785.

It is an arithmetic number, because the mean of its divisors is an integer number (2131746).

Almost surely, 2^21966704 is an apocalyptic number.

It is an amenable number.

21966704 is a deficient number, since it is larger than the sum of its proper divisors (20668216).

21966704 is a wasteful number, since it uses less digits than its factorization.

21966704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2402 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 21966704 is about 4686.8650503295. The cubic root of 21966704 is about 280.0625030535.

The spelling of 21966704 in words is "twenty-one million, nine hundred sixty-six thousand, seven hundred four".