12618018 has 48 divisors (see below), whose sum is σ = 32410560. Its totient is φ = 3604176.

The previous prime is 12618017. The next prime is 12618041. The reversal of 12618018 is 81081621.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12617982 and 12618000.

It is not an unprimeable number, because it can be changed into a prime (12618017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1548 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (675220).

Almost surely, 2^12618018 is an apocalyptic number.

12618018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12618018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16205280).

12618018 is an abundant number, since it is smaller than the sum of its proper divisors (19792542).

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

12618018 is an equidigital number, since it uses as much as digits as its factorization.

12618018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733 (or 3721 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 12618018 is about 3552.1849614005. The cubic root of 12618018 is about 232.8075430652.

Adding to 12618018 its reverse (81081621), we get a palindrome (93699639).

The spelling of 12618018 in words is "twelve million, six hundred eighteen thousand, eighteen".