21704567804 has 12 divisors (see below), whose sum is σ = 38026309944. Its totient is φ = 10839907824.

The previous prime is 21704567761. The next prime is 21704567821. The reversal of 21704567804 is 40876540712.

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, 3090074 + ... + 3097089.

It is an arithmetic number, because the mean of its divisors is an integer number (3168859162).

Almost surely, 2^21704567804 is an apocalyptic number.

It is an amenable number.

21704567804 is a deficient number, since it is larger than the sum of its proper divisors (16321742140).

21704567804 is a wasteful number, since it uses less digits than its factorization.

21704567804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6188044 (or 6188042 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 44.

The spelling of 21704567804 in words is "twenty-one billion, seven hundred four million, five hundred sixty-seven thousand, eight hundred four".