18039308913 has 12 divisors (see below), whose sum is σ = 26058856720. Its totient is φ = 12025247256.

The previous prime is 18039308897. The next prime is 18039308951. The reversal of 18039308913 is 31980393081.

It is a happy number.

18039308913 is a `hidden beast` number, since 180 + 393 + 0 + 89 + 1 + 3 = 666.

It is not a de Polignac number, because 18039308913 - 2⁴ = 18039308897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18039308953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50478 + ... + 196536.

Almost surely, 2^18039308913 is an apocalyptic number.

It is an amenable number.

18039308913 is a deficient number, since it is larger than the sum of its proper divisors (8019547807).

18039308913 is a wasteful number, since it uses less digits than its factorization.

18039308913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159788 (or 159785 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 18039308913 in words is "eighteen billion, thirty-nine million, three hundred eight thousand, nine hundred thirteen".