21713860688 has 40 divisors (see below), whose sum is σ = 45328327968. Its totient is φ = 10017021312.

The previous prime is 21713860681. The next prime is 21713860699. The reversal of 21713860688 is 88606831712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21713860681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434531 + ... + 481917.

Almost surely, 2^21713860688 is an apocalyptic number.

It is an amenable number.

21713860688 is an abundant number, since it is smaller than the sum of its proper divisors (23614467280).

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

21713860688 is a wasteful number, since it uses less digits than its factorization.

21713860688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49611 (or 49605 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 21713860688 in words is "twenty-one billion, seven hundred thirteen million, eight hundred sixty thousand, six hundred eighty-eight".