18212312 has 16 divisors (see below), whose sum is σ = 34875360. Its totient is φ = 8912224.

The previous prime is 18212303. The next prime is 18212333. The reversal of 18212312 is 21321281.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23843 + ... + 24594.

It is an arithmetic number, because the mean of its divisors is an integer number (2179710).

Almost surely, 2^18212312 is an apocalyptic number.

It is an amenable number.

18212312 is a deficient number, since it is larger than the sum of its proper divisors (16663048).

18212312 is a wasteful number, since it uses less digits than its factorization.

18212312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48490 (or 48486 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 18212312 is about 4267.5885462401. The cubic root of 18212312 is about 263.1005124064.

Adding to 18212312 its reverse (21321281), we get a palindrome (39533593).

The spelling of 18212312 in words is "eighteen million, two hundred twelve thousand, three hundred twelve".