20713509104 has 20 divisors (see below), whose sum is σ = 42493155264. Its totient is φ = 9747533568.

The previous prime is 20713509101. The next prime is 20713509139. The reversal of 20713509104 is 40190531702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20713509101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38076032 + ... + 38076575.

Almost surely, 2^20713509104 is an apocalyptic number.

It is an amenable number.

20713509104 is an abundant number, since it is smaller than the sum of its proper divisors (21779646160).

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

20713509104 is a wasteful number, since it uses less digits than its factorization.

20713509104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76152632 (or 76152626 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The spelling of 20713509104 in words is "twenty billion, seven hundred thirteen million, five hundred nine thousand, one hundred four".