13031039920 has 160 divisors (see below), whose sum is σ = 32964890112. Its totient is φ = 4771393536.

The previous prime is 13031039909. The next prime is 13031039941. The reversal of 13031039920 is 2993013031.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25906389 + ... + 25906891.

Almost surely, 2^13031039920 is an apocalyptic number.

13031039920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13031039920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16482445056).

13031039920 is an abundant number, since it is smaller than the sum of its proper divisors (19933850192).

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

13031039920 is a wasteful number, since it uses less digits than its factorization.

13031039920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019 (or 1013 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 31.

The spelling of 13031039920 in words is "thirteen billion, thirty-one million, thirty-nine thousand, nine hundred twenty".