13871218136 has 32 divisors (see below), whose sum is σ = 27569944080. Its totient is φ = 6520166400.

The previous prime is 13871218133. The next prime is 13871218211. The reversal of 13871218136 is 63181217831.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13871218093 and 13871218102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13871218133) 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, 61931 + ... + 177701.

Almost surely, 2^13871218136 is an apocalyptic number.

It is an amenable number.

13871218136 is a deficient number, since it is larger than the sum of its proper divisors (13698725944).

13871218136 is a wasteful number, since it uses less digits than its factorization.

13871218136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116675 (or 116671 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The spelling of 13871218136 in words is "thirteen billion, eight hundred seventy-one million, two hundred eighteen thousand, one hundred thirty-six".