18336385 has 8 divisors (see below), whose sum is σ = 22087080. Its totient is φ = 14613504.

The previous prime is 18336377. The next prime is 18336391. The reversal of 18336385 is 58363381.

It can be written as a sum of positive squares in 4 ways, for example, as 494209 + 17842176 = 703^2 + 4224^2 .

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 18336385 - 2³ = 18336377 is a prime.

It is an unprimeable number.

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, 5472 + ... + 8161.

It is an arithmetic number, because the mean of its divisors is an integer number (2760885).

Almost surely, 2^18336385 is an apocalyptic number.

It is an amenable number.

18336385 is a deficient number, since it is larger than the sum of its proper divisors (3750695).

18336385 is a wasteful number, since it uses less digits than its factorization.

18336385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13907.

The product of its digits is 51840, while the sum is 37.

The square root of 18336385 is about 4282.1005359520. The cubic root of 18336385 is about 263.6966259928.

It can be divided in two parts, 18336 and 385, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 18336385 in words is "eighteen million, three hundred thirty-six thousand, three hundred eighty-five".