18393222 has 16 divisors (see below), whose sum is σ = 36875520. Its totient is φ = 6116232.

The previous prime is 18393203. The next prime is 18393223. The reversal of 18393222 is 22239381.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18393222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18393223) 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, 858 + ... + 6125.

It is an arithmetic number, because the mean of its divisors is an integer number (2304720).

Almost surely, 2^18393222 is an apocalyptic number.

18393222 is an abundant number, since it is smaller than the sum of its proper divisors (18482298).

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

18393222 is a wasteful number, since it uses less digits than its factorization.

18393222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7427.

The product of its digits is 5184, while the sum is 30.

The square root of 18393222 is about 4288.7319804343. The cubic root of 18393222 is about 263.9688037059.

The spelling of 18393222 in words is "eighteen million, three hundred ninety-three thousand, two hundred twenty-two".