18442312 has 32 divisors (see below), whose sum is σ = 41601600. Its totient is φ = 7487424.

The previous prime is 18442247. The next prime is 18442337. The reversal of 18442312 is 21324481.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7603 + ... + 9730.

It is an arithmetic number, because the mean of its divisors is an integer number (1300050).

Almost surely, 2^18442312 is an apocalyptic number.

It is an amenable number.

18442312 is an abundant number, since it is smaller than the sum of its proper divisors (23159288).

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

18442312 is a wasteful number, since it uses less digits than its factorization.

18442312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17365 (or 17361 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 18442312 is about 4294.4513037174. The cubic root of 18442312 is about 264.2034321193.

Adding to 18442312 its reverse (21324481), we get a palindrome (39766793).

The spelling of 18442312 in words is "eighteen million, four hundred forty-two thousand, three hundred twelve".