18344 has 8 divisors (see below), whose sum is σ = 34410. Its totient is φ = 9168.

The previous prime is 18341. The next prime is 18353. The reversal of 18344 is 44381.

It can be written as a sum of positive squares in only one way, i.e., 16900 + 1444 = 130^2 + 38^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (18341) 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 as a sum of consecutive naturals, namely, 1139 + ... + 1154.

2¹⁸³⁴⁴ is an apocalyptic number.

It is an amenable number.

18344 is a deficient number, since it is larger than the sum of its proper divisors (16066).

18344 is a wasteful number, since it uses less digits than its factorization.

18344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299 (or 2295 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 18344 is about 135.4400236267. The cubic root of 18344 is about 26.3733124861.

The spelling of 18344 in words is "eighteen thousand, three hundred forty-four".