12816018 has 24 divisors (see below), whose sum is σ = 27860508. Its totient is φ = 4257792.

The previous prime is 12816017. The next prime is 12816029. The reversal of 12816018 is 81061821.

It can be written as a sum of positive squares in 2 ways, for example, as 12552849 + 263169 = 3543^2 + 513^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12815982 and 12816000.

It is not an unprimeable number, because it can be changed into a prime (12816017) 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 11 ways as a sum of consecutive naturals, for example, 5346 + ... + 7362.

Almost surely, 2^12816018 is an apocalyptic number.

12816018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12816018 is an abundant number, since it is smaller than the sum of its proper divisors (15044490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12816018 is a wasteful number, since it uses less digits than its factorization.

12816018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378 (or 2375 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 12816018 is about 3579.9466476471. The cubic root of 12816018 is about 234.0189552911.

Adding to 12816018 its reverse (81061821), we get a palindrome (93877839).

The spelling of 12816018 in words is "twelve million, eight hundred sixteen thousand, eighteen".