12818 has 16 divisors (see below), whose sum is σ = 22680. Its totient is φ = 5376.

The previous prime is 12809. The next prime is 12821. The reversal of 12818 is 81821.

12818 = 27² + 28² + ... + 38².

12818 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 4 ways, for example, as 10609 + 2209 = 103^2 + 47^2 .

It is a super-2 number, since 2×12818² = 328602248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12818.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428 + ... + 456.

2¹²⁸¹⁸ is an apocalyptic number.

12818 is a deficient number, since it is larger than the sum of its proper divisors (9862).

12818 is a wasteful number, since it uses less digits than its factorization.

12818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61.

The product of its digits is 128, while the sum is 20.

The square root of 12818 is about 113.2166065558. The cubic root of 12818 is about 23.4031018364.

It can be divided in two parts, 128 and 18, that multiplied together give a square (2304 = 48²).

The spelling of 12818 in words is "twelve thousand, eight hundred eighteen".