18425344 has 80 divisors (see below), whose sum is σ = 43309728. Its totient is φ = 7667712.

The previous prime is 18425339. The next prime is 18425347. The reversal of 18425344 is 44352481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18425347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189904 + ... + 190000.

Almost surely, 2^18425344 is an apocalyptic number.

18425344 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 18425344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21654864).

18425344 is an abundant number, since it is smaller than the sum of its proper divisors (24884384).

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

18425344 is an frugal number, since it uses more digits than its factorization.

18425344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 159 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The square root of 18425344 is about 4292.4752765741. The cubic root of 18425344 is about 264.1223797470.

It can be divided in two parts, 18425 and 344, that added together give a square (18769 = 137²).

The spelling of 18425344 in words is "eighteen million, four hundred twenty-five thousand, three hundred forty-four".