18112342 has 4 divisors (see below), whose sum is σ = 27168516. Its totient is φ = 9056170.

The previous prime is 18112333. The next prime is 18112349. The reversal of 18112342 is 24321181.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18112349) by changing a digit.

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 as a sum of consecutive naturals, namely, 4528084 + ... + 4528087.

It is an arithmetic number, because the mean of its divisors is an integer number (6792129).

Almost surely, 2^18112342 is an apocalyptic number.

18112342 is a deficient number, since it is larger than the sum of its proper divisors (9056174).

18112342 is an equidigital number, since it uses as much as digits as its factorization.

18112342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9056173.

The product of its digits is 384, while the sum is 22.

The square root of 18112342 is about 4255.8597251319. The cubic root of 18112342 is about 262.6182300367.

The spelling of 18112342 in words is "eighteen million, one hundred twelve thousand, three hundred forty-two".