18499180844 has 48 divisors (see below), whose sum is σ = 33819575328. Its totient is φ = 8846143488.

The previous prime is 18499180831. The next prime is 18499180849. The reversal of 18499180844 is 44808199481.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18499180844.

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 15 ways as a sum of consecutive naturals, for example, 5258174 + ... + 5261690.

It is an arithmetic number, because the mean of its divisors is an integer number (704574486).

Almost surely, 2^18499180844 is an apocalyptic number.

It is an amenable number.

18499180844 is a deficient number, since it is larger than the sum of its proper divisors (15320394484).

18499180844 is a wasteful number, since it uses less digits than its factorization.

18499180844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194 (or 4192 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 56.

The spelling of 18499180844 in words is "eighteen billion, four hundred ninety-nine million, one hundred eighty thousand, eight hundred forty-four".