18036222 has 8 divisors (see below), whose sum is σ = 36072456. Its totient is φ = 6012072.

The previous prime is 18036169. The next prime is 18036229. The reversal of 18036222 is 22263081.

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

18036222 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 18036192 and 18036201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18036229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1503013 + ... + 1503024.

It is an arithmetic number, because the mean of its divisors is an integer number (4509057).

Almost surely, 2^18036222 is an apocalyptic number.

18036222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18036222 is a wasteful number, since it uses less digits than its factorization.

18036222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3006042.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 18036222 is about 4246.9073453514. The cubic root of 18036222 is about 262.2498151430.

The spelling of 18036222 in words is "eighteen million, thirty-six thousand, two hundred twenty-two".