18090112 has 64 divisors (see below), whose sum is σ = 38384640. Its totient is φ = 8478720.

The previous prime is 18090097. The next prime is 18090157. The reversal of 18090112 is 21109081.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186448 + ... + 186544.

It is an arithmetic number, because the mean of its divisors is an integer number (599760).

Almost surely, 2^18090112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18090112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19192320).

18090112 is an abundant number, since it is smaller than the sum of its proper divisors (20294528).

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

18090112 is an equidigital number, since it uses as much as digits as its factorization.

18090112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 18090112 is about 4253.2472300585. The cubic root of 18090112 is about 262.5107454407.

Adding to 18090112 its reverse (21109081), we get a palindrome (39199193).

The spelling of 18090112 in words is "eighteen million, ninety thousand, one hundred twelve".