18340618 has 8 divisors (see below), whose sum is σ = 28150848. Its totient is φ = 8957004.

The previous prime is 18340613. The next prime is 18340627. The reversal of 18340618 is 81604381.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18340618.

It is not an unprimeable number, because it can be changed into a prime (18340613) 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, 106546 + ... + 106717.

It is an arithmetic number, because the mean of its divisors is an integer number (3518856).

Almost surely, 2^18340618 is an apocalyptic number.

18340618 is a deficient number, since it is larger than the sum of its proper divisors (9810230).

18340618 is a wasteful number, since it uses less digits than its factorization.

18340618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213308.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 18340618 is about 4282.5947741994. The cubic root of 18340618 is about 263.7169161051.

Adding to 18340618 its reverse (81604381), we get a palindrome (99944999).

The spelling of 18340618 in words is "eighteen million, three hundred forty thousand, six hundred eighteen".