12631318 has 16 divisors (see below), whose sum is σ = 22096800. Its totient is φ = 5413128.

The previous prime is 12631303. The next prime is 12631337. The reversal of 12631318 is 81313621.

It is a junction number, because it is equal to n+sod(n) for n = 12631292 and 12631301.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8521 + ... + 9892.

It is an arithmetic number, because the mean of its divisors is an integer number (1381050).

Almost surely, 2^12631318 is an apocalyptic number.

12631318 is a deficient number, since it is larger than the sum of its proper divisors (9465482).

12631318 is an equidigital number, since it uses as much as digits as its factorization.

12631318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18436 (or 18422 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 12631318 is about 3554.0565555433. The cubic root of 12631318 is about 232.8893111385.

Adding to 12631318 its reverse (81313621), we get a palindrome (93944939).

The spelling of 12631318 in words is "twelve million, six hundred thirty-one thousand, three hundred eighteen".