13131320320 has 44 divisors (see below), whose sum is σ = 31499792784. Its totient is φ = 5252526080.

The previous prime is 13131320317. The next prime is 13131320327. The reversal of 13131320320 is 2302313131.

It is not an unprimeable number, because it can be changed into a prime (13131320327) 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, 1277236 + ... + 1287475.

Almost surely, 2^13131320320 is an apocalyptic number.

13131320320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13131320320 is an abundant number, since it is smaller than the sum of its proper divisors (18368472464).

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

13131320320 is an equidigital number, since it uses as much as digits as its factorization.

13131320320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564736 (or 2564718 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 13131320320 its reverse (2302313131), we get a palindrome (15433633451).

The spelling of 13131320320 in words is "thirteen billion, one hundred thirty-one million, three hundred twenty thousand, three hundred twenty".