18336506 has 8 divisors (see below), whose sum is σ = 29122740. Its totient is φ = 8628928.

The previous prime is 18336503. The next prime is 18336509. The reversal of 18336506 is 60563381.

It is an interprime number because it is at equal distance from previous prime (18336503) and next prime (18336509).

It can be written as a sum of positive squares in 2 ways, for example, as 17682025 + 654481 = 4205^2 + 809^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18336503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269621 + ... + 269688.

Almost surely, 2^18336506 is an apocalyptic number.

18336506 is a deficient number, since it is larger than the sum of its proper divisors (10786234).

18336506 is a wasteful number, since it uses less digits than its factorization.

18336506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539328.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 18336506 is about 4282.1146645086. The cubic root of 18336506 is about 263.6972060275.

Adding to 18336506 its reverse (60563381), we get a palindrome (78899887).

The spelling of 18336506 in words is "eighteen million, three hundred thirty-six thousand, five hundred six".