18123344 has 40 divisors (see below), whose sum is σ = 36902400. Its totient is φ = 8611200.

The previous prime is 18123331. The next prime is 18123361. The reversal of 18123344 is 44332181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29957 + ... + 30555.

It is an arithmetic number, because the mean of its divisors is an integer number (922560).

Almost surely, 2^18123344 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 18123344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18451200).

18123344 is an abundant number, since it is smaller than the sum of its proper divisors (18779056).

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

18123344 is a wasteful number, since it uses less digits than its factorization.

18123344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 693 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 18123344 is about 4257.1520997023. The cubic root of 18123344 is about 262.6713934348.

The spelling of 18123344 in words is "eighteen million, one hundred twenty-three thousand, three hundred forty-four".