18116510831 has 2 divisors, whose sum is σ = 18116510832. Its totient is φ = 18116510830.

The previous prime is 18116510807. The next prime is 18116510891. The reversal of 18116510831 is 13801561181.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18116510831 - 2²⁶ = 18049401967 is a prime.

It is a super-2 number, since 2×18116510831² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18116510791 and 18116510800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18116510891) 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 as a sum of consecutive naturals, namely, 9058255415 + 9058255416.

It is an arithmetic number, because the mean of its divisors is an integer number (9058255416).

Almost surely, 2^18116510831 is an apocalyptic number.

18116510831 is a deficient number, since it is larger than the sum of its proper divisors (1).

18116510831 is an equidigital number, since it uses as much as digits as its factorization.

18116510831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 35.

The spelling of 18116510831 in words is "eighteen billion, one hundred sixteen million, five hundred ten thousand, eight hundred thirty-one".