18499180845 has 32 divisors (see below), whose sum is σ = 29881694592. Its totient is φ = 9772019712.

The previous prime is 18499180831. The next prime is 18499180849. The reversal of 18499180845 is 54808199481.

It is not a de Polignac number, because 18499180845 - 2¹⁶ = 18499115309 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18499180849) 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, 3171822 + ... + 3177648.

It is an arithmetic number, because the mean of its divisors is an integer number (933802956).

Almost surely, 2^18499180845 is an apocalyptic number.

18499180845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18499180845 is a deficient number, since it is larger than the sum of its proper divisors (11382513747).

18499180845 is a wasteful number, since it uses less digits than its factorization.

18499180845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7821.

The product of its (nonzero) digits is 3317760, while the sum is 57.

The spelling of 18499180845 in words is "eighteen billion, four hundred ninety-nine million, one hundred eighty thousand, eight hundred forty-five".