18137717475 has 12 divisors (see below), whose sum is σ = 29987693016. Its totient is φ = 9673449280.

The previous prime is 18137717449. The next prime is 18137717489. The reversal of 18137717475 is 57471773181.

It is a happy number.

It is not a de Polignac number, because 18137717475 - 2⁵ = 18137717443 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120918042 + ... + 120918191.

It is an arithmetic number, because the mean of its divisors is an integer number (2498974418).

Almost surely, 2^18137717475 is an apocalyptic number.

18137717475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18137717475 is a deficient number, since it is larger than the sum of its proper divisors (11849975541).

18137717475 is a wasteful number, since it uses less digits than its factorization.

18137717475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241836246 (or 241836241 counting only the distinct ones).

The product of its digits is 1152480, while the sum is 51.

The spelling of 18137717475 in words is "eighteen billion, one hundred thirty-seven million, seven hundred seventeen thousand, four hundred seventy-five".