18447055904 has 48 divisors (see below), whose sum is σ = 37710149400. Its totient is φ = 8872249344.

The previous prime is 18447055877. The next prime is 18447055937. The reversal of 18447055904 is 40955074481.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13665610000 + 4781445904 = 116900^2 + 69148^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212684 + ... + 286580.

Almost surely, 2^18447055904 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 18447055904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18855074700).

18447055904 is an abundant number, since it is smaller than the sum of its proper divisors (19263093496).

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

18447055904 is a wasteful number, since it uses less digits than its factorization.

18447055904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74205 (or 74197 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 18447055904 in words is "eighteen billion, four hundred forty-seven million, fifty-five thousand, nine hundred four".