18462218 has 8 divisors (see below), whose sum is σ = 28368900. Its totient is φ = 9005920.

The previous prime is 18462203. The next prime is 18462229. The reversal of 18462218 is 81226481.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17280649 + 1181569 = 4157^2 + 1087^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 112493 + ... + 112656.

Almost surely, 2^18462218 is an apocalyptic number.

18462218 is a deficient number, since it is larger than the sum of its proper divisors (9906682).

18462218 is a wasteful number, since it uses less digits than its factorization.

18462218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225192.

The product of its digits is 6144, while the sum is 32.

The square root of 18462218 is about 4296.7683204939. The cubic root of 18462218 is about 264.2984553181.

Adding to 18462218 its reverse (81226481), we get a palindrome (99688699).

The spelling of 18462218 in words is "eighteen million, four hundred sixty-two thousand, two hundred eighteen".