18044572 has 48 divisors (see below), whose sum is σ = 39372480. Its totient is φ = 7045632.

The previous prime is 18044561. The next prime is 18044597. The reversal of 18044572 is 27544081.

It is a plaindrome in base 16.

It is a congruent number.

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, 32118 + ... + 32674.

It is an arithmetic number, because the mean of its divisors is an integer number (820260).

Almost surely, 2^18044572 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 18044572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19686240).

18044572 is an abundant number, since it is smaller than the sum of its proper divisors (21327908).

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

18044572 is a wasteful number, since it uses less digits than its factorization.

18044572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 18044572 is about 4247.8902999018. The cubic root of 18044572 is about 262.2902790517.

The spelling of 18044572 in words is "eighteen million, forty-four thousand, five hundred seventy-two".