18338243 has 8 divisors (see below), whose sum is σ = 22863360. Its totient is φ = 14289480.

The previous prime is 18338239. The next prime is 18338261. The reversal of 18338243 is 34283381.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18338243 - 2² = 18338239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18338233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119003 + ... + 119156.

It is an arithmetic number, because the mean of its divisors is an integer number (2857920).

Almost surely, 2^18338243 is an apocalyptic number.

18338243 is a deficient number, since it is larger than the sum of its proper divisors (4525117).

18338243 is a wasteful number, since it uses less digits than its factorization.

18338243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238177.

The product of its digits is 13824, while the sum is 32.

The square root of 18338243 is about 4282.3174800568. The cubic root of 18338243 is about 263.7055323609.

It can be divided in two parts, 18338 and 243, that added together give a palindrome (18581).

The spelling of 18338243 in words is "eighteen million, three hundred thirty-eight thousand, two hundred forty-three".