18112182720 has 56 divisors (see below), whose sum is σ = 57506183184. Its totient is φ = 4829915136.

The previous prime is 18112182703. The next prime is 18112182731. The reversal of 18112182720 is 2728121181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9432469 + ... + 9434388.

Almost surely, 2^18112182720 is an apocalyptic number.

18112182720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18112182720 is an abundant number, since it is smaller than the sum of its proper divisors (39394000464).

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

18112182720 is a wasteful number, since it uses less digits than its factorization.

18112182720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18866877 (or 18866867 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 33.

The spelling of 18112182720 in words is "eighteen billion, one hundred twelve million, one hundred eighty-two thousand, seven hundred twenty".