21031847704 has 32 divisors (see below), whose sum is σ = 47719320480. Its totient is φ = 8483433984.

The previous prime is 21031847693. The next prime is 21031847713. The reversal of 21031847704 is 40774813012.

It is a congruent number.

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, 11045187 + ... + 11047090.

It is an arithmetic number, because the mean of its divisors is an integer number (1491228765).

Almost surely, 2^21031847704 is an apocalyptic number.

It is an amenable number.

21031847704 is an abundant number, since it is smaller than the sum of its proper divisors (26687472776).

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

21031847704 is a wasteful number, since it uses less digits than its factorization.

21031847704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22092307 (or 22092303 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 21031847704 in words is "twenty-one billion, thirty-one million, eight hundred forty-seven thousand, seven hundred four".