18517518339 has 16 divisors (see below), whose sum is σ = 25774267392. Its totient is φ = 11803339328.

The previous prime is 18517518319. The next prime is 18517518343. The reversal of 18517518339 is 93381571581.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18517518339 - 2¹¹ = 18517516291 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 18517518291 and 18517518300.

It is not an unprimeable number, because it can be changed into a prime (18517518319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114007 + ... + 223679.

It is an arithmetic number, because the mean of its divisors is an integer number (1610891712).

Almost surely, 2^18517518339 is an apocalyptic number.

18517518339 is a deficient number, since it is larger than the sum of its proper divisors (7256749053).

18517518339 is a wasteful number, since it uses less digits than its factorization.

18517518339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112146.

The product of its digits is 907200, while the sum is 51.

The spelling of 18517518339 in words is "eighteen billion, five hundred seventeen million, five hundred eighteen thousand, three hundred thirty-nine".