13004939520 has 108 divisors (see below), whose sum is σ = 44995775916. Its totient is φ = 3467980800.

The previous prime is 13004939491. The next prime is 13004939533. The reversal of 13004939520 is 2593940031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9069133824 + 3935805696 = 95232^2 + 62736^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 552931 + ... + 575970.

Almost surely, 2^13004939520 is an apocalyptic number.

13004939520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13004939520 is an abundant number, since it is smaller than the sum of its proper divisors (31990836396).

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

13004939520 is a wasteful number, since it uses less digits than its factorization.

13004939520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128928 (or 1128911 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The spelling of 13004939520 in words is "thirteen billion, four million, nine hundred thirty-nine thousand, five hundred twenty".