18239241 has 4 divisors (see below), whose sum is σ = 24318992. Its totient is φ = 12159492.

The previous prime is 18239233. The next prime is 18239251. The reversal of 18239241 is 14293281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18239241 - 2³ = 18239233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18239199 and 18239208.

It is not an unprimeable number, because it can be changed into a prime (18239251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3039871 + ... + 3039876.

It is an arithmetic number, because the mean of its divisors is an integer number (6079748).

Almost surely, 2^18239241 is an apocalyptic number.

It is an amenable number.

18239241 is a deficient number, since it is larger than the sum of its proper divisors (6079751).

18239241 is an equidigital number, since it uses as much as digits as its factorization.

18239241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6079750.

The product of its digits is 3456, while the sum is 30.

The square root of 18239241 is about 4270.7424413092. The cubic root of 18239241 is about 263.2301233449.

The spelling of 18239241 in words is "eighteen million, two hundred thirty-nine thousand, two hundred forty-one".