21730608804 has 24 divisors (see below), whose sum is σ = 50967478240. Its totient is φ = 7206004224.

The previous prime is 21730608793. The next prime is 21730608827. The reversal of 21730608804 is 40880603712.

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, 4689094 + ... + 4693725.

Almost surely, 2^21730608804 is an apocalyptic number.

It is an amenable number.

21730608804 is an abundant number, since it is smaller than the sum of its proper divisors (29236869436).

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

21730608804 is a wasteful number, since it uses less digits than its factorization.

21730608804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9383019 (or 9383017 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 21730608804 in words is "twenty-one billion, seven hundred thirty million, six hundred eight thousand, eight hundred four".