18194800320 has 336 divisors, whose sum is σ = 65182272480. Its totient is φ = 4654153728.

The previous prime is 18194800289. The next prime is 18194800321. The reversal of 18194800320 is 2300849181.

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

It is not an unprimeable number, because it can be changed into a prime (18194800321) 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, 7777711 + ... + 7780049.

Almost surely, 2^18194800320 is an apocalyptic number.

18194800320 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 18194800320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32591136240).

18194800320 is an abundant number, since it is smaller than the sum of its proper divisors (46987472160).

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

18194800320 is a wasteful number, since it uses less digits than its factorization.

18194800320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472 (or 2459 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 18194800320 in words is "eighteen billion, one hundred ninety-four million, eight hundred thousand, three hundred twenty".