18033218 has 16 divisors (see below), whose sum is σ = 31190400. Its totient is φ = 7659456.

The previous prime is 18033217. The next prime is 18033229. The reversal of 18033218 is 81233081.

It is not an unprimeable number, because it can be changed into a prime (18033217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4118 + ... + 7281.

It is an arithmetic number, because the mean of its divisors is an integer number (1949400).

Almost surely, 2^18033218 is an apocalyptic number.

18033218 is a deficient number, since it is larger than the sum of its proper divisors (13157182).

18033218 is a wasteful number, since it uses less digits than its factorization.

18033218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11521.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18033218 is about 4246.5536615001. The cubic root of 18033218 is about 262.2352547732.

Adding to 18033218 its reverse (81233081), we get a palindrome (99266299).

The spelling of 18033218 in words is "eighteen million, thirty-three thousand, two hundred eighteen".