18889113600 has 816 divisors, whose sum is σ = 80613907840. Its totient is φ = 4246732800.

The previous prime is 18889113521. The next prime is 18889113601. The reversal of 18889113600 is 631198881.

It is a super-2 number, since 2×18889113600² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (18889113601) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 309657570 + ... + 309657630.

Almost surely, 2^18889113600 is an apocalyptic number.

18889113600 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 18889113600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40306953920).

18889113600 is an abundant number, since it is smaller than the sum of its proper divisors (61724794240).

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

18889113600 is an frugal number, since it uses more digits than its factorization.

18889113600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 18889113600 in words is "eighteen billion, eight hundred eighty-nine million, one hundred thirteen thousand, six hundred".