18242342 has 4 divisors (see below), whose sum is σ = 27363516. Its totient is φ = 9121170.

The previous prime is 18242333. The next prime is 18242359. The reversal of 18242342 is 24324281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24324281 = 37 ⋅657413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560584 + ... + 4560587.

It is an arithmetic number, because the mean of its divisors is an integer number (6840879).

Almost surely, 2^18242342 is an apocalyptic number.

18242342 is a deficient number, since it is larger than the sum of its proper divisors (9121174).

18242342 is an equidigital number, since it uses as much as digits as its factorization.

18242342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9121173.

The product of its digits is 3072, while the sum is 26.

The square root of 18242342 is about 4271.1054775081. The cubic root of 18242342 is about 263.2450404561.

It can be divided in two parts, 182 and 42342, that added together give a palindrome (42524).

The spelling of 18242342 in words is "eighteen million, two hundred forty-two thousand, three hundred forty-two".