18316369 has 4 divisors (see below), whose sum is σ = 18811444. Its totient is φ = 17821296.

The previous prime is 18316351. The next prime is 18316379. The reversal of 18316369 is 96361381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6310144 + 12006225 = 2512^2 + 3465^2 .

It is a cyclic number.

It is not a de Polignac number, because 18316369 - 2¹³ = 18308177 is a prime.

It is a super-2 number, since 2×18316369² = 670978746688322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 495037 = 18316369 / (1 + 8 + 3 + 1 + 6 + 3 + 6 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18316339) 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 3 ways as a sum of consecutive naturals, for example, 247482 + ... + 247555.

It is an arithmetic number, because the mean of its divisors is an integer number (4702861).

Almost surely, 2^18316369 is an apocalyptic number.

It is an amenable number.

18316369 is a deficient number, since it is larger than the sum of its proper divisors (495075).

18316369 is an equidigital number, since it uses as much as digits as its factorization.

18316369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495074.

The product of its digits is 23328, while the sum is 37.

The square root of 18316369 is about 4279.7627270679. The cubic root of 18316369 is about 263.6006406359.

The spelling of 18316369 in words is "eighteen million, three hundred sixteen thousand, three hundred sixty-nine".