18497190131 has 4 divisors (see below), whose sum is σ = 21139645872. Its totient is φ = 15854734392.

The previous prime is 18497190079. The next prime is 18497190149. The reversal of 18497190131 is 13109179481.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18497190131 - 2³⁰ = 17423448307 is a prime.

It is a super-2 number, since 2×18497190131² (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 (18497190161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321227860 + ... + 1321227873.

It is an arithmetic number, because the mean of its divisors is an integer number (5284911468).

Almost surely, 2^18497190131 is an apocalyptic number.

18497190131 is a deficient number, since it is larger than the sum of its proper divisors (2642455741).

18497190131 is an equidigital number, since it uses as much as digits as its factorization.

18497190131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642455740.

The product of its (nonzero) digits is 54432, while the sum is 44.

The spelling of 18497190131 in words is "eighteen billion, four hundred ninety-seven million, one hundred ninety thousand, one hundred thirty-one".