18999508800 has 168 divisors, whose sum is σ = 65044783296. Its totient is φ = 4846223360.

The previous prime is 18999508789. The next prime is 18999508837. The reversal of 18999508800 is 880599981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24352 + ... + 196448.

Almost surely, 2^18999508800 is an apocalyptic number.

18999508800 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 18999508800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32522391648).

18999508800 is an abundant number, since it is smaller than the sum of its proper divisors (46045274496).

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

18999508800 is a wasteful number, since it uses less digits than its factorization.

18999508800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172145 (or 172130 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 57.

The spelling of 18999508800 in words is "eighteen billion, nine hundred ninety-nine million, five hundred eight thousand, eight hundred".