12143818 has 8 divisors (see below), whose sum is σ = 18403812. Its totient is φ = 6009216.

The previous prime is 12143809. The next prime is 12143843. The reversal of 12143818 is 81834121.

12143818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12089529 + 54289 = 3477^2 + 233^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31105 + ... + 31492.

Almost surely, 2^12143818 is an apocalyptic number.

12143818 is a deficient number, since it is larger than the sum of its proper divisors (6259994).

12143818 is an equidigital number, since it uses as much as digits as its factorization.

12143818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62696.

The product of its digits is 1536, while the sum is 28.

The square root of 12143818 is about 3484.7981290169. The cubic root of 12143818 is about 229.8538327749.

Adding to 12143818 its reverse (81834121), we get a palindrome (93977939).

The spelling of 12143818 in words is "twelve million, one hundred forty-three thousand, eight hundred eighteen".