12318 has 8 divisors (see below), whose sum is σ = 24648. Its totient is φ = 4104.
The previous prime is 12301. The next prime is 12323. The reversal of 12318 is 81321.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
12318 is an admirable number.
It is a Smith number, since the sum of its digits (15) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a plaindrome in base 14.
It is a junction number, because it is equal to n+sod(n) for n = 12297 and 12306.
It is a congruent number.
It is an unprimeable number.
12318 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021 + ... + 1032.
It is an arithmetic number, because the mean of its divisors is an integer number (3081).
212318 is an apocalyptic number.
12318 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12324).
12318 is a wasteful number, since it uses less digits than its factorization.
12318 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2058.
The product of its digits is 48, while the sum is 15.
The square root of 12318 is about 110.9864856638. The cubic root of 12318 is about 23.0947571543.
Adding to 12318 its reverse (81321), we get a palindrome (93639).
It can be divided in two parts, 123 and 18, that added together give a palindrome (141).
The spelling of 12318 in words is "twelve thousand, three hundred eighteen".
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