18441218 has 8 divisors (see below), whose sum is σ = 28554240. Its totient is φ = 8923140.

The previous prime is 18441169. The next prime is 18441233. The reversal of 18441218 is 81214481.

It is a happy number.

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, 148658 + ... + 148781.

It is an arithmetic number, because the mean of its divisors is an integer number (3569280).

Almost surely, 2^18441218 is an apocalyptic number.

18441218 is a deficient number, since it is larger than the sum of its proper divisors (10113022).

18441218 is a wasteful number, since it uses less digits than its factorization.

18441218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297472.

The product of its digits is 2048, while the sum is 29.

The square root of 18441218 is about 4294.3239281638. The cubic root of 18441218 is about 264.1982078236.

Adding to 18441218 its reverse (81214481), we get a palindrome (99655699).

The spelling of 18441218 in words is "eighteen million, four hundred forty-one thousand, two hundred eighteen".