18447044 has 48 divisors (see below), whose sum is σ = 40715136. Its totient is φ = 7104000.

The previous prime is 18447001. The next prime is 18447061. The reversal of 18447044 is 44074481.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18447044.

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, 30812 + ... + 31404.

It is an arithmetic number, because the mean of its divisors is an integer number (848232).

Almost surely, 2^18447044 is an apocalyptic number.

18447044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18447044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20357568).

18447044 is an abundant number, since it is smaller than the sum of its proper divisors (22268092).

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

18447044 is a wasteful number, since it uses less digits than its factorization.

18447044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 32.

The square root of 18447044 is about 4295.0022118737. The cubic root of 18447044 is about 264.2260269676.

It can be divided in two parts, 1844 and 7044, that added together give a palindrome (8888).

The spelling of 18447044 in words is "eighteen million, four hundred forty-seven thousand, forty-four".