18499180831 has 2 divisors, whose sum is σ = 18499180832. Its totient is φ = 18499180830.

The previous prime is 18499180811. The next prime is 18499180849. The reversal of 18499180831 is 13808199481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18499180831 - 2⁷ = 18499180703 is a prime.

It is a super-2 number, since 2×18499180831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18499180811) 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, 9249590415 + 9249590416.

It is an arithmetic number, because the mean of its divisors is an integer number (9249590416).

Almost surely, 2^18499180831 is an apocalyptic number.

18499180831 is a deficient number, since it is larger than the sum of its proper divisors (1).

18499180831 is an equidigital number, since it uses as much as digits as its factorization.

18499180831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 52.

The spelling of 18499180831 in words is "eighteen billion, four hundred ninety-nine million, one hundred eighty thousand, eight hundred thirty-one".