18112236 has 12 divisors (see below), whose sum is σ = 42261912. Its totient is φ = 6037408.

The previous prime is 18112219. The next prime is 18112243. The reversal of 18112236 is 63221181.

18112236 is nontrivially palindromic in base 14.

It is a tau number, because it is divible by the number of its divisors (12).

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, 754665 + ... + 754688.

It is an arithmetic number, because the mean of its divisors is an integer number (3521826).

Almost surely, 2^18112236 is an apocalyptic number.

It is an amenable number.

18112236 is an abundant number, since it is smaller than the sum of its proper divisors (24149676).

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

18112236 is a wasteful number, since it uses less digits than its factorization.

18112236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509360 (or 1509358 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 18112236 is about 4255.8472716957. The cubic root of 18112236 is about 262.6177177233.

The spelling of 18112236 in words is "eighteen million, one hundred twelve thousand, two hundred thirty-six".