13181338320 has 40 divisors (see below), whose sum is σ = 40862149536. Its totient is φ = 3515023488.

The previous prime is 13181338309. The next prime is 13181338397. The reversal of 13181338320 is 2383318131.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27460882 + ... + 27461361.

Almost surely, 2^13181338320 is an apocalyptic number.

13181338320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13181338320 is an abundant number, since it is smaller than the sum of its proper divisors (27680811216).

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

13181338320 is a wasteful number, since it uses less digits than its factorization.

13181338320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54922259 (or 54922253 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 13181338320 in words is "thirteen billion, one hundred eighty-one million, three hundred thirty-eight thousand, three hundred twenty".