18113344 has 28 divisors (see below), whose sum is σ = 36445444. Its totient is φ = 8930304.

The previous prime is 18113341. The next prime is 18113353. The reversal of 18113344 is 44331181.

It can be written as a sum of positive squares in 2 ways, for example, as 7354944 + 10758400 = 2712^2 + 3280^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18113341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2734 + ... + 6610.

It is an arithmetic number, because the mean of its divisors is an integer number (1301623).

Almost surely, 2^18113344 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 18113344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18222722).

18113344 is an abundant number, since it is smaller than the sum of its proper divisors (18332100).

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

18113344 is an equidigital number, since it uses as much as digits as its factorization.

18113344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3962 (or 3952 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 18113344 is about 4255.9774435492. The cubic root of 18113344 is about 262.6230727496.

The spelling of 18113344 in words is "eighteen million, one hundred thirteen thousand, three hundred forty-four".