12320418 has 64 divisors (see below), whose sum is σ = 28667520. Its totient is φ = 3494400.

The previous prime is 12320411. The next prime is 12320431. The reversal of 12320418 is 81402321.

It is a junction number, because it is equal to n+sod(n) for n = 12320394 and 12320403.

It is not an unprimeable number, because it can be changed into a prime (12320411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78396 + ... + 78552.

It is an arithmetic number, because the mean of its divisors is an integer number (447930).

Almost surely, 2^12320418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12320418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14333760).

12320418 is an abundant number, since it is smaller than the sum of its proper divisors (16347102).

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

12320418 is a wasteful number, since it uses less digits than its factorization.

12320418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 12320418 is about 3510.0452988530. The cubic root of 12320418 is about 230.9626820772.

Adding to 12320418 its reverse (81402321), we get a palindrome (93722739).

The spelling of 12320418 in words is "twelve million, three hundred twenty thousand, four hundred eighteen".