12018340 has 48 divisors (see below), whose sum is σ = 26334000. Its totient is φ = 4603392.

The previous prime is 12018329. The next prime is 12018353. The reversal of 12018340 is 4381021.

12018340 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 8 ways, for example, as 19044 + 11999296 = 138^2 + 3464^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80586 + ... + 80734.

It is an arithmetic number, because the mean of its divisors is an integer number (548625).

Almost surely, 2^12018340 is an apocalyptic number.

12018340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12018340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13167000).

12018340 is an abundant number, since it is smaller than the sum of its proper divisors (14315660).

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

12018340 is a wasteful number, since it uses less digits than its factorization.

12018340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 12018340 is about 3466.7477554619. The cubic root of 12018340 is about 229.0594228050.

Adding to 12018340 its reverse (4381021), we get a palindrome (16399361).

The spelling of 12018340 in words is "twelve million, eighteen thousand, three hundred forty".