18009120 has 96 divisors (see below), whose sum is σ = 60092928. Its totient is φ = 4517888.

The previous prime is 18009119. The next prime is 18009133. The reversal of 18009120 is 2190081.

It is a tau number, because it is divible by the number of its divisors (96).

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, 7057 + ... + 9263.

It is an arithmetic number, because the mean of its divisors is an integer number (625968).

Almost surely, 2^18009120 is an apocalyptic number.

18009120 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 18009120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30046464).

18009120 is an abundant number, since it is smaller than the sum of its proper divisors (42083808).

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

18009120 is a wasteful number, since it uses less digits than its factorization.

18009120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242 (or 2234 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 18009120 is about 4243.7153533195. The cubic root of 18009120 is about 262.1183933579.

The spelling of 18009120 in words is "eighteen million, nine thousand, one hundred twenty".