18785243 has 16 divisors (see below), whose sum is σ = 20716800. Its totient is φ = 16964640.

The previous prime is 18785237. The next prime is 18785317. The reversal of 18785243 is 34258781.

It is a cyclic number.

It is not a de Polignac number, because 18785243 - 2¹⁰ = 18784219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18785197 and 18785206.

It is not an unprimeable number, because it can be changed into a prime (18785203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56588 + ... + 56918.

It is an arithmetic number, because the mean of its divisors is an integer number (1294800).

Almost surely, 2^18785243 is an apocalyptic number.

18785243 is a deficient number, since it is larger than the sum of its proper divisors (1931557).

18785243 is a wasteful number, since it uses less digits than its factorization.

18785243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482.

The product of its digits is 53760, while the sum is 38.

The square root of 18785243 is about 4334.1946195343. The cubic root of 18785243 is about 265.8309882317.

The spelling of 18785243 in words is "eighteen million, seven hundred eighty-five thousand, two hundred forty-three".