18000522240 has 176 divisors, whose sum is σ = 57994621440. Its totient is φ = 4765040640.

The previous prime is 18000522179. The next prime is 18000522257. The reversal of 18000522240 is 4222500081.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18000522240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2130825 + ... + 2139255.

Almost surely, 2^18000522240 is an apocalyptic number.

18000522240 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 18000522240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28997310720).

18000522240 is an abundant number, since it is smaller than the sum of its proper divisors (39994099200).

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

18000522240 is a wasteful number, since it uses less digits than its factorization.

18000522240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8598 (or 8580 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The spelling of 18000522240 in words is "eighteen billion, five hundred twenty-two thousand, two hundred forty".