18108144 has 80 divisors (see below), whose sum is σ = 52496640. Its totient is φ = 5976000.

The previous prime is 18108131. The next prime is 18108149. The reversal of 18108144 is 44180181.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18108149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72019 + ... + 72269.

It is an arithmetic number, because the mean of its divisors is an integer number (656208).

Almost surely, 2^18108144 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 18108144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26248320).

18108144 is an abundant number, since it is smaller than the sum of its proper divisors (34388496).

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

18108144 is a wasteful number, since it uses less digits than its factorization.

18108144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 18108144 is about 4255.3664942047. The cubic root of 18108144 is about 262.5979389646.

The spelling of 18108144 in words is "eighteen million, one hundred eight thousand, one hundred forty-four".