18216130131 has 24 divisors (see below), whose sum is σ = 27167693696. Its totient is φ = 11749432320.

The previous prime is 18216130109. The next prime is 18216130159. The reversal of 18216130131 is 13103161281.

18216130131 is a `hidden beast` number, since 18 + 2 + 1 + 613 + 0 + 1 + 31 = 666.

It is not a de Polignac number, because 18216130131 - 2⁵ = 18216130099 is a prime.

It is a super-2 number, since 2×18216130131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18216130095 and 18216130104.

It is not an unprimeable number, because it can be changed into a prime (18216130531) 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, 2192421 + ... + 2200713.

Almost surely, 2^18216130131 is an apocalyptic number.

18216130131 is a deficient number, since it is larger than the sum of its proper divisors (8951563565).

18216130131 is a wasteful number, since it uses less digits than its factorization.

18216130131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16203 (or 16200 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 18216130131 in words is "eighteen billion, two hundred sixteen million, one hundred thirty thousand, one hundred thirty-one".