12318563 has 4 divisors (see below), whose sum is σ = 12715968. Its totient is φ = 11921160.

The previous prime is 12318539. The next prime is 12318569. The reversal of 12318563 is 36581321.

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

It is a cyclic number.

It is not a de Polignac number, because 12318563 - 2⁶ = 12318499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12318569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198656 + ... + 198717.

It is an arithmetic number, because the mean of its divisors is an integer number (3178992).

Almost surely, 2^12318563 is an apocalyptic number.

12318563 is a deficient number, since it is larger than the sum of its proper divisors (397405).

12318563 is an equidigital number, since it uses as much as digits as its factorization.

12318563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397404.

The product of its digits is 4320, while the sum is 29.

The square root of 12318563 is about 3509.7810473020. The cubic root of 12318563 is about 230.9510900116.

Adding to 12318563 its reverse (36581321), we get a palindrome (48899884).

The spelling of 12318563 in words is "twelve million, three hundred eighteen thousand, five hundred sixty-three".