18785441 has 4 divisors (see below), whose sum is σ = 18830484. Its totient is φ = 18740400.

The previous prime is 18785419. The next prime is 18785443. The reversal of 18785441 is 14458781.

It is a happy number.

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 9150625 + 9634816 = 3025^2 + 3104^2 .

It is a cyclic number.

It is not a de Polignac number, because 18785441 - 2¹⁰ = 18784417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18785395 and 18785404.

It is not an unprimeable number, because it can be changed into a prime (18785443) 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, 21890 + ... + 22731.

It is an arithmetic number, because the mean of its divisors is an integer number (4707621).

Almost surely, 2^18785441 is an apocalyptic number.

It is an amenable number.

18785441 is a deficient number, since it is larger than the sum of its proper divisors (45043).

18785441 is an equidigital number, since it uses as much as digits as its factorization.

18785441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45042.

The product of its digits is 35840, while the sum is 38.

The square root of 18785441 is about 4334.2174610880. The cubic root of 18785441 is about 265.8319221980.

The spelling of 18785441 in words is "eighteen million, seven hundred eighty-five thousand, four hundred forty-one".