18839984800 has 432 divisors, whose sum is σ = 60317514432. Its totient is φ = 5607014400.

The previous prime is 18839984797. The next prime is 18839984809. The reversal of 18839984800 is 848993881.

It is not an unprimeable number, because it can be changed into a prime (18839984809) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 16088215 + ... + 16089385.

It is an arithmetic number, because the mean of its divisors is an integer number (139623876).

Almost surely, 2^18839984800 is an apocalyptic number.

18839984800 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 18839984800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30158757216).

18839984800 is an abundant number, since it is smaller than the sum of its proper divisors (41477529632).

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

18839984800 is a wasteful number, since it uses less digits than its factorization.

18839984800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1215 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 58.

The spelling of 18839984800 in words is "eighteen billion, eight hundred thirty-nine million, nine hundred eighty-four thousand, eight hundred".