18205800000 has 336 divisors, whose sum is σ = 63416566080. Its totient is φ = 4596480000.

The previous prime is 18205799993. The next prime is 18205800017. The reversal of 18205800000 is 850281.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11399202 + ... + 11400798.

It is an arithmetic number, because the mean of its divisors is an integer number (188739780).

Almost surely, 2^18205800000 is an apocalyptic number.

18205800000 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 18205800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31708283040).

18205800000 is an abundant number, since it is smaller than the sum of its proper divisors (45210766080).

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

18205800000 is an equidigital number, since it uses as much as digits as its factorization.

18205800000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The spelling of 18205800000 in words is "eighteen billion, two hundred five million, eight hundred thousand".