18045544 has 16 divisors (see below), whose sum is σ = 36911520. Its totient is φ = 8202480.

The previous prime is 18045541. The next prime is 18045553. The reversal of 18045544 is 44554081.

It is not an unprimeable number, because it can be changed into a prime (18045541) 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 3 ways as a sum of consecutive naturals, for example, 102444 + ... + 102619.

It is an arithmetic number, because the mean of its divisors is an integer number (2306970).

Almost surely, 2^18045544 is an apocalyptic number.

It is an amenable number.

18045544 is an abundant number, since it is smaller than the sum of its proper divisors (18865976).

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

18045544 is a wasteful number, since it uses less digits than its factorization.

18045544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205080 (or 205076 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 18045544 is about 4248.0047080953. The cubic root of 18045544 is about 262.2949885302.

The spelling of 18045544 in words is "eighteen million, forty-five thousand, five hundred forty-four".