18243369 has 12 divisors (see below), whose sum is σ = 26506116. Its totient is φ = 12090912.

The previous prime is 18243361. The next prime is 18243371. The reversal of 18243369 is 96334281.

It can be written as a sum of positive squares in 2 ways, for example, as 6953769 + 11289600 = 2637^2 + 3360^2 .

It is not a de Polignac number, because 18243369 - 2³ = 18243361 is a prime.

It is a super-2 number, since 2×18243369² = 665641024940322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18243361) 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 11 ways as a sum of consecutive naturals, for example, 4302 + ... + 7415.

It is an arithmetic number, because the mean of its divisors is an integer number (2208843).

Almost surely, 2^18243369 is an apocalyptic number.

It is an amenable number.

18243369 is a deficient number, since it is larger than the sum of its proper divisors (8262747).

18243369 is a wasteful number, since it uses less digits than its factorization.

18243369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11896 (or 11893 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 18243369 is about 4271.2257023014. The cubic root of 18243369 is about 263.2499803844.

The spelling of 18243369 in words is "eighteen million, two hundred forty-three thousand, three hundred sixty-nine".