18660041 has 4 divisors (see below), whose sum is σ = 18915732. Its totient is φ = 18404352.

The previous prime is 18660023. The next prime is 18660073. The reversal of 18660041 is 14006681.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3254416 + 15405625 = 1804^2 + 3925^2 .

It is a cyclic number.

It is not a de Polignac number, because 18660041 - 2¹⁴ = 18643657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18660011) 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, 127736 + ... + 127881.

It is an arithmetic number, because the mean of its divisors is an integer number (4728933).

Almost surely, 2^18660041 is an apocalyptic number.

It is an amenable number.

18660041 is a deficient number, since it is larger than the sum of its proper divisors (255691).

18660041 is an equidigital number, since it uses as much as digits as its factorization.

18660041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255690.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18660041 is about 4319.7269589640. The cubic root of 18660041 is about 265.2390912091.

The spelling of 18660041 in words is "eighteen million, six hundred sixty thousand, forty-one".