18009516120 has 64 divisors (see below), whose sum is σ = 56377624320. Its totient is φ = 4593730944.

The previous prime is 18009516079. The next prime is 18009516139. The reversal of 18009516120 is 2161590081.

It is a congruent number.

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, 3259834 + ... + 3265353.

It is an arithmetic number, because the mean of its divisors is an integer number (880900380).

Almost surely, 2^18009516120 is an apocalyptic number.

18009516120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18009516120 is an abundant number, since it is smaller than the sum of its proper divisors (38368108200).

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

18009516120 is a wasteful number, since it uses less digits than its factorization.

18009516120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6525224 (or 6525220 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 33.

The spelling of 18009516120 in words is "eighteen billion, nine million, five hundred sixteen thousand, one hundred twenty".