18843242 has 16 divisors (see below), whose sum is σ = 32648832. Its totient is φ = 8061120.

The previous prime is 18843239. The next prime is 18843283. The reversal of 18843242 is 24234881.

It is a junction number, because it is equal to n+sod(n) for n = 18843199 and 18843208.

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 7 ways as a sum of consecutive naturals, for example, 24818 + ... + 25565.

It is an arithmetic number, because the mean of its divisors is an integer number (2040552).

Almost surely, 2^18843242 is an apocalyptic number.

18843242 is a deficient number, since it is larger than the sum of its proper divisors (13805590).

18843242 is a wasteful number, since it uses less digits than its factorization.

18843242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50413.

The product of its digits is 12288, while the sum is 32.

The square root of 18843242 is about 4340.8803254639. The cubic root of 18843242 is about 266.1042894811.

The spelling of 18843242 in words is "eighteen million, eight hundred forty-three thousand, two hundred forty-two".