18918104364 has 120 divisors (see below), whose sum is σ = 50132019168. Its totient is φ = 6220281600.

The previous prime is 18918104363. The next prime is 18918104377. The reversal of 18918104364 is 46340181981.

18918104364 is a `hidden beast` number, since 189 + 1 + 8 + 104 + 364 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18918104363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10241689 + ... + 10243535.

Almost surely, 2^18918104364 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 18918104364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25066009584).

18918104364 is an abundant number, since it is smaller than the sum of its proper divisors (31213914804).

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

18918104364 is a wasteful number, since it uses less digits than its factorization.

18918104364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277 (or 2266 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 18918104364 in words is "eighteen billion, nine hundred eighteen million, one hundred four thousand, three hundred sixty-four".