18840241 has 4 divisors (see below), whose sum is σ = 21531712. Its totient is φ = 16148772.

The previous prime is 18840223. The next prime is 18840247. The reversal of 18840241 is 14204881.

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 a cyclic number.

It is not a de Polignac number, because 18840241 - 2⁵ = 18840209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18840247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1345725 + ... + 1345738.

It is an arithmetic number, because the mean of its divisors is an integer number (5382928).

Almost surely, 2^18840241 is an apocalyptic number.

It is an amenable number.

18840241 is a deficient number, since it is larger than the sum of its proper divisors (2691471).

18840241 is an equidigital number, since it uses as much as digits as its factorization.

18840241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691470.

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 18840241 is about 4340.5346444879. The cubic root of 18840241 is about 266.0901620224.

The spelling of 18840241 in words is "eighteen million, eight hundred forty thousand, two hundred forty-one".