13396638732 has 12 divisors (see below), whose sum is σ = 31258823736. Its totient is φ = 4465546240.

The previous prime is 13396638701. The next prime is 13396638737. The reversal of 13396638732 is 23783669331.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (13396638737) 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, 558193269 + ... + 558193292.

It is an arithmetic number, because the mean of its divisors is an integer number (2604901978).

Almost surely, 2^13396638732 is an apocalyptic number.

13396638732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13396638732 is an abundant number, since it is smaller than the sum of its proper divisors (17862185004).

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

13396638732 is a wasteful number, since it uses less digits than its factorization.

13396638732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116386568 (or 1116386566 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 51.

The spelling of 13396638732 in words is "thirteen billion, three hundred ninety-six million, six hundred thirty-eight thousand, seven hundred thirty-two".