18236988000 has 1920 divisors, whose sum is σ = 90416342016. Its totient is φ = 3483648000.

The previous prime is 18236987981. The next prime is 18236988061. The reversal of 18236988000 is 88963281.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 424115979 + ... + 424116021.

Almost surely, 2^18236988000 is an apocalyptic number.

18236988000 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 18236988000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45208171008).

18236988000 is an abundant number, since it is smaller than the sum of its proper divisors (72179354016).

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

18236988000 is a wasteful number, since it uses less digits than its factorization.

18236988000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 18236988000 in words is "eighteen billion, two hundred thirty-six million, nine hundred eighty-eight thousand".