18369369 has 8 divisors (see below), whose sum is σ = 27213920. Its totient is φ = 12246228.

The previous prime is 18369359. The next prime is 18369389. The reversal of 18369369 is 96396381.

It is not a de Polignac number, because 18369369 - 2¹⁶ = 18303833 is a prime.

It is a super-3 number, since 3×18369369³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18369319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340147 + ... + 340200.

It is an arithmetic number, because the mean of its divisors is an integer number (3401740).

Almost surely, 2^18369369 is an apocalyptic number.

It is an amenable number.

18369369 is a deficient number, since it is larger than the sum of its proper divisors (8844551).

18369369 is an equidigital number, since it uses as much as digits as its factorization.

18369369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680356 (or 680350 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 18369369 is about 4285.9501863647. The cubic root of 18369369 is about 263.8546462251.

The spelling of 18369369 in words is "eighteen million, three hundred sixty-nine thousand, three hundred sixty-nine".