18222112 has 24 divisors (see below), whose sum is σ = 36009792. Its totient is φ = 9076800.

The previous prime is 18222109. The next prime is 18222119. The reversal of 18222112 is 21122281.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 18222112.

It is not an unprimeable number, because it can be changed into a prime (18222119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9037 + ... + 10867.

It is an arithmetic number, because the mean of its divisors is an integer number (1500408).

Almost surely, 2^18222112 is an apocalyptic number.

It is an amenable number.

18222112 is a deficient number, since it is larger than the sum of its proper divisors (17787680).

18222112 is a wasteful number, since it uses less digits than its factorization.

18222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152 (or 2144 counting only the distinct ones).

The product of its digits is 128, while the sum is 19.

The square root of 18222112 is about 4268.7365812381. The cubic root of 18222112 is about 263.1476951892.

Adding to 18222112 its reverse (21122281), we get a palindrome (39344393).

The spelling of 18222112 in words is "eighteen million, two hundred twenty-two thousand, one hundred twelve".