18885944000 has 896 divisors, whose sum is σ = 64270761984. Its totient is φ = 5322240000.

The previous prime is 18885943997. The next prime is 18885944029. The reversal of 18885944000 is 44958881.

It is a happy number.

It is a super-2 number, since 2×18885944000² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 439207979 + ... + 439208021.

Almost surely, 2^18885944000 is an apocalyptic number.

18885944000 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 18885944000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32135380992).

18885944000 is an abundant number, since it is smaller than the sum of its proper divisors (45384817984).

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

18885944000 is a wasteful number, since it uses less digits than its factorization.

18885944000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 47.

The spelling of 18885944000 in words is "eighteen billion, eight hundred eighty-five million, nine hundred forty-four thousand".