18336398 has 8 divisors (see below), whose sum is σ = 27628608. Its totient is φ = 9126864.

The previous prime is 18336391. The next prime is 18336467. The reversal of 18336398 is 89363381.

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

It is a super-2 number, since 2×18336398² = 672446983228808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18336391) 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, 20111 + ... + 21002.

It is an arithmetic number, because the mean of its divisors is an integer number (3453576).

Almost surely, 2^18336398 is an apocalyptic number.

18336398 is a deficient number, since it is larger than the sum of its proper divisors (9292210).

18336398 is a wasteful number, since it uses less digits than its factorization.

18336398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41338.

The product of its digits is 93312, while the sum is 41.

The square root of 18336398 is about 4282.1020538983. The cubic root of 18336398 is about 263.6966883107.

The spelling of 18336398 in words is "eighteen million, three hundred thirty-six thousand, three hundred ninety-eight".