20710691868 has 48 divisors (see below), whose sum is σ = 49375670400. Its totient is φ = 6754845504.

The previous prime is 20710691857. The next prime is 20710691899. The reversal of 20710691868 is 86819601702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33355 + ... + 206237.

It is an arithmetic number, because the mean of its divisors is an integer number (1028659800).

Almost surely, 2^20710691868 is an apocalyptic number.

It is an amenable number.

20710691868 is an abundant number, since it is smaller than the sum of its proper divisors (28664978532).

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

20710691868 is a wasteful number, since it uses less digits than its factorization.

20710691868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173106 (or 173104 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 48.

The spelling of 20710691868 in words is "twenty billion, seven hundred ten million, six hundred ninety-one thousand, eight hundred sixty-eight".