18666208000 has 288 divisors, whose sum is σ = 53416097280. Its totient is φ = 6428160000.

The previous prime is 18666207983. The next prime is 18666208007. The reversal of 18666208000 is 80266681.

It is not an unprimeable number, because it can be changed into a prime (18666208007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6686605 + ... + 6689395.

It is an arithmetic number, because the mean of its divisors is an integer number (185472560).

Almost surely, 2^18666208000 is an apocalyptic number.

18666208000 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 18666208000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26708048640).

18666208000 is an abundant number, since it is smaller than the sum of its proper divisors (34749889280).

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

18666208000 is a wasteful number, since it uses less digits than its factorization.

18666208000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852 (or 2828 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 18666208000 in words is "eighteen billion, six hundred sixty-six million, two hundred eight thousand".