18870168831 has 32 divisors (see below), whose sum is σ = 26240793600. Its totient is φ = 12051680256.

The previous prime is 18870168803. The next prime is 18870168851. The reversal of 18870168831 is 13886107881.

It is not a de Polignac number, because 18870168831 - 2⁶ = 18870168767 is a prime.

It is a super-2 number, since 2×18870168831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18870168851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2138230 + ... + 2147036.

It is an arithmetic number, because the mean of its divisors is an integer number (820024800).

Almost surely, 2^18870168831 is an apocalyptic number.

18870168831 is a deficient number, since it is larger than the sum of its proper divisors (7370624769).

18870168831 is a wasteful number, since it uses less digits than its factorization.

18870168831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9143.

The product of its (nonzero) digits is 516096, while the sum is 51.

The spelling of 18870168831 in words is "eighteen billion, eight hundred seventy million, one hundred sixty-eight thousand, eight hundred thirty-one".