12018412 has 72 divisors (see below), whose sum is σ = 26883360. Its totient is φ = 4596480.

The previous prime is 12018401. The next prime is 12018437. The reversal of 12018412 is 21481021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 12018412.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 293112 + ... + 293152.

It is an arithmetic number, because the mean of its divisors is an integer number (373380).

Almost surely, 2^12018412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12018412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13441680).

12018412 is an abundant number, since it is smaller than the sum of its proper divisors (14864948).

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

12018412 is a wasteful number, since it uses less digits than its factorization.

12018412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 12018412 is about 3466.7581398188. The cubic root of 12018412 is about 229.0598802238.

Adding to 12018412 its reverse (21481021), we get a palindrome (33499433).

The spelling of 12018412 in words is "twelve million, eighteen thousand, four hundred twelve".