18117295903 has 16 divisors (see below), whose sum is σ = 20775362560. Its totient is φ = 15476774976.

The previous prime is 18117295883. The next prime is 18117295951. The reversal of 18117295903 is 30959271181.

It is a cyclic number.

It is not a de Polignac number, because 18117295903 - 2²⁵ = 18083741471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18117290903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4071826 + ... + 4076272.

It is an arithmetic number, because the mean of its divisors is an integer number (1298460160).

Almost surely, 2^18117295903 is an apocalyptic number.

18117295903 is a deficient number, since it is larger than the sum of its proper divisors (2658066657).

18117295903 is a wasteful number, since it uses less digits than its factorization.

18117295903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6286.

The product of its (nonzero) digits is 136080, while the sum is 46.

The spelling of 18117295903 in words is "eighteen billion, one hundred seventeen million, two hundred ninety-five thousand, nine hundred three".