13920665880 has 64 divisors (see below), whose sum is σ = 45558547200. Its totient is φ = 3374706560.

The previous prime is 13920665861. The next prime is 13920665893. The reversal of 13920665880 is 8856602931.

It is a happy number.

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, 5271660 + ... + 5274299.

It is an arithmetic number, because the mean of its divisors is an integer number (711852300).

Almost surely, 2^13920665880 is an apocalyptic number.

13920665880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13920665880 is an abundant number, since it is smaller than the sum of its proper divisors (31637881320).

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

13920665880 is a wasteful number, since it uses less digits than its factorization.

13920665880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10545984 (or 10545980 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 13920665880 in words is "thirteen billion, nine hundred twenty million, six hundred sixty-five thousand, eight hundred eighty".