18204516450 has 96 divisors (see below), whose sum is σ = 50471918400. Its totient is φ = 4824696960.

The previous prime is 18204516433. The next prime is 18204516497. The reversal of 18204516450 is 5461540281.

It is a happy number.

18204516450 is a `hidden beast` number, since 1 + 8 + 2 + 0 + 4 + 5 + 1 + 645 + 0 = 666.

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, 178686 + ... + 261414.

It is an arithmetic number, because the mean of its divisors is an integer number (525749150).

Almost surely, 2^18204516450 is an apocalyptic number.

18204516450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18204516450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25235959200).

18204516450 is an abundant number, since it is smaller than the sum of its proper divisors (32267401950).

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

18204516450 is a wasteful number, since it uses less digits than its factorization.

18204516450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82913 (or 82902 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 18204516450 in words is "eighteen billion, two hundred four million, five hundred sixteen thousand, four hundred fifty".