18006218 has 8 divisors (see below), whose sum is σ = 27034560. Its totient is φ = 8994700.

The previous prime is 18006193. The next prime is 18006221. The reversal of 18006218 is 81260081.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1058 + ... + 6093.

It is an arithmetic number, because the mean of its divisors is an integer number (3379320).

Almost surely, 2^18006218 is an apocalyptic number.

18006218 is a deficient number, since it is larger than the sum of its proper divisors (9028342).

18006218 is a wasteful number, since it uses less digits than its factorization.

18006218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8412.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 18006218 is about 4243.3734221725. The cubic root of 18006218 is about 262.1043132985.

Adding to 18006218 its reverse (81260081), we get a palindrome (99266299).

The spelling of 18006218 in words is "eighteen million, six thousand, two hundred eighteen".