18365508000 has 768 divisors, whose sum is σ = 80951270400. Its totient is φ = 3948134400.

The previous prime is 18365507959. The next prime is 18365508001. The reversal of 18365508000 is 80556381.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18365508001) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12851286 + ... + 12852714.

It is an arithmetic number, because the mean of its divisors is an integer number (105405300).

Almost surely, 2^18365508000 is an apocalyptic number.

18365508000 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 18365508000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40475635200).

18365508000 is an abundant number, since it is smaller than the sum of its proper divisors (62585762400).

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

18365508000 is a wasteful number, since it uses less digits than its factorization.

18365508000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487 (or 1463 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 18365508000 in words is "eighteen billion, three hundred sixty-five million, five hundred eight thousand".