18322212 has 24 divisors (see below), whose sum is σ = 42840000. Its totient is φ = 6094816.

The previous prime is 18322193. The next prime is 18322217. The reversal of 18322212 is 21222381.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18322217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5914 + ... + 8462.

It is an arithmetic number, because the mean of its divisors is an integer number (1785000).

Almost surely, 2^18322212 is an apocalyptic number.

18322212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18322212 is an abundant number, since it is smaller than the sum of its proper divisors (24517788).

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

18322212 is a wasteful number, since it uses less digits than its factorization.

18322212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155 (or 3153 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 18322212 is about 4280.4453039374. The cubic root of 18322212 is about 263.6286675662.

Adding to 18322212 its reverse (21222381), we get a palindrome (39544593).

The spelling of 18322212 in words is "eighteen million, three hundred twenty-two thousand, two hundred twelve".