13139747868 has 24 divisors (see below), whose sum is σ = 33017828368. Its totient is φ = 4042999296.

The previous prime is 13139747867. The next prime is 13139747879. The reversal of 13139747868 is 86874793131.

It is a happy number.

It is a super-2 number, since 2×13139747868² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13139747867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42114421 + ... + 42114732.

Almost surely, 2^13139747868 is an apocalyptic number.

It is an amenable number.

13139747868 is an abundant number, since it is smaller than the sum of its proper divisors (19878080500).

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

13139747868 is a wasteful number, since it uses less digits than its factorization.

13139747868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84229173 (or 84229171 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 57.

The spelling of 13139747868 in words is "thirteen billion, one hundred thirty-nine million, seven hundred forty-seven thousand, eight hundred sixty-eight".