18549116808 has 64 divisors (see below), whose sum is σ = 47460349440. Its totient is φ = 6039081984.

The previous prime is 18549116801. The next prime is 18549116893. The reversal of 18549116808 is 80861194581.

It is not an unprimeable number, because it can be changed into a prime (18549116801) 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, 250960 + ... + 316352.

It is an arithmetic number, because the mean of its divisors is an integer number (741567960).

Almost surely, 2^18549116808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18549116808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23730174720).

18549116808 is an abundant number, since it is smaller than the sum of its proper divisors (28911232632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18549116808 is a wasteful number, since it uses less digits than its factorization.

18549116808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65678 (or 65674 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 51.

The spelling of 18549116808 in words is "eighteen billion, five hundred forty-nine million, one hundred sixteen thousand, eight hundred eight".