18045888 has 112 divisors (see below), whose sum is σ = 56570880. Its totient is φ = 4967424.

The previous prime is 18045851. The next prime is 18045889. The reversal of 18045888 is 88854081.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18045889) 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, 38745 + ... + 39207.

Almost surely, 2^18045888 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 18045888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28285440).

18045888 is an abundant number, since it is smaller than the sum of its proper divisors (38524992).

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

18045888 is a wasteful number, since it uses less digits than its factorization.

18045888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 42.

The square root of 18045888 is about 4248.0451974997. The cubic root of 18045888 is about 262.2966552187.

The spelling of 18045888 in words is "eighteen million, forty-five thousand, eight hundred eighty-eight".