18055872000 has 720 divisors, whose sum is σ = 69102242352. Its totient is φ = 4702924800.

The previous prime is 18055871993. The next prime is 18055872059. The reversal of 18055872000 is 27855081.

18055872000 is a `hidden beast` number, since 1 + 80 + 558 + 7 + 20 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 419903979 + ... + 419904021.

Almost surely, 2^18055872000 is an apocalyptic number.

18055872000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18055872000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34551121176).

18055872000 is an abundant number, since it is smaller than the sum of its proper divisors (51046370352).

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

18055872000 is an frugal number, since it uses more digits than its factorization.

18055872000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The spelling of 18055872000 in words is "eighteen billion, fifty-five million, eight hundred seventy-two thousand".