12643018 has 8 divisors (see below), whose sum is σ = 19962720. Its totient is φ = 5988780.

The previous prime is 12643003. The next prime is 12643021. The reversal of 12643018 is 81034621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12642983 and 12643001.

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 3 ways as a sum of consecutive naturals, for example, 166318 + ... + 166393.

It is an arithmetic number, because the mean of its divisors is an integer number (2495340).

Almost surely, 2^12643018 is an apocalyptic number.

12643018 is a deficient number, since it is larger than the sum of its proper divisors (7319702).

12643018 is a wasteful number, since it uses less digits than its factorization.

12643018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332732.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 12643018 is about 3555.7021810045. The cubic root of 12643018 is about 232.9611950087.

Adding to 12643018 its reverse (81034621), we get a palindrome (93677639).

The spelling of 12643018 in words is "twelve million, six hundred forty-three thousand, eighteen".