12311418 has 16 divisors (see below), whose sum is σ = 28140480. Its totient is φ = 3517536.

The previous prime is 12311401. The next prime is 12311419. The reversal of 12311418 is 81411321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12311394 and 12311403.

It is not an unprimeable number, because it can be changed into a prime (12311419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146523 + ... + 146606.

It is an arithmetic number, because the mean of its divisors is an integer number (1758780).

Almost surely, 2^12311418 is an apocalyptic number.

12311418 is an abundant number, since it is smaller than the sum of its proper divisors (15829062).

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

12311418 is a wasteful number, since it uses less digits than its factorization.

12311418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293141.

The product of its digits is 192, while the sum is 21.

The square root of 12311418 is about 3508.7630299010. The cubic root of 12311418 is about 230.9064293728.

Adding to 12311418 its reverse (81411321), we get a palindrome (93722739).

The spelling of 12311418 in words is "twelve million, three hundred eleven thousand, four hundred eighteen".