18708241 has 4 divisors (see below), whose sum is σ = 18851184. Its totient is φ = 18565300.

The previous prime is 18708229. The next prime is 18708247. The reversal of 18708241 is 14280781.

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 18708241 - 2⁷ = 18708113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18708247) 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 in 3 ways as a sum of consecutive naturals, for example, 71275 + ... + 71536.

It is an arithmetic number, because the mean of its divisors is an integer number (4712796).

Almost surely, 2^18708241 is an apocalyptic number.

It is an amenable number.

18708241 is a deficient number, since it is larger than the sum of its proper divisors (142943).

18708241 is a wasteful number, since it uses less digits than its factorization.

18708241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142942.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 18708241 is about 4325.3024171727. The cubic root of 18708241 is about 265.4672709906.

The spelling of 18708241 in words is "eighteen million, seven hundred eight thousand, two hundred forty-one".