18814585131 has 24 divisors (see below), whose sum is σ = 28128653696. Its totient is φ = 12105832320.

The previous prime is 18814585123. The next prime is 18814585133. The reversal of 18814585131 is 13158541881.

18814585131 is a `hidden beast` number, since 1 + 8 + 81 + 4 + 58 + 513 + 1 = 666.

It is not a de Polignac number, because 18814585131 - 2³ = 18814585123 is a prime.

It is a super-2 number, since 2×18814585131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18814585133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13671 + ... + 194463.

Almost surely, 2^18814585131 is an apocalyptic number.

18814585131 is a deficient number, since it is larger than the sum of its proper divisors (9314068565).

18814585131 is a wasteful number, since it uses less digits than its factorization.

18814585131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181203 (or 181200 counting only the distinct ones).

The product of its digits is 153600, while the sum is 45.

The spelling of 18814585131 in words is "eighteen billion, eight hundred fourteen million, five hundred eighty-five thousand, one hundred thirty-one".