18508542720 has 144 divisors (see below), whose sum is σ = 59444098560. Its totient is φ = 4907855872.

The previous prime is 18508542697. The next prime is 18508542733. The reversal of 18508542720 is 2724580581.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673897 + ... + 700823.

It is an arithmetic number, because the mean of its divisors is an integer number (412806240).

Almost surely, 2^18508542720 is an apocalyptic number.

18508542720 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 18508542720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29722049280).

18508542720 is an abundant number, since it is smaller than the sum of its proper divisors (40935555840).

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

18508542720 is a wasteful number, since it uses less digits than its factorization.

18508542720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27130 (or 27116 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 42.

The spelling of 18508542720 in words is "eighteen billion, five hundred eight million, five hundred forty-two thousand, seven hundred twenty".