18045218 has 8 divisors (see below), whose sum is σ = 27449280. Its totient is φ = 8895460.

The previous prime is 18045199. The next prime is 18045253. The reversal of 18045218 is 81254081.

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

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, 63398 + ... + 63681.

It is an arithmetic number, because the mean of its divisors is an integer number (3431160).

Almost surely, 2^18045218 is an apocalyptic number.

18045218 is a deficient number, since it is larger than the sum of its proper divisors (9404062).

18045218 is a wasteful number, since it uses less digits than its factorization.

18045218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127152.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 18045218 is about 4247.9663369664. The cubic root of 18045218 is about 262.2934090326.

Adding to 18045218 its reverse (81254081), we get a palindrome (99299299).

The spelling of 18045218 in words is "eighteen million, forty-five thousand, two hundred eighteen".