12011418 has 36 divisors (see below), whose sum is σ = 27657630. Its totient is φ = 3766656.

The previous prime is 12011411. The next prime is 12011459. The reversal of 12011418 is 81411021.

It can be written as a sum of positive squares in 3 ways, for example, as 11923209 + 88209 = 3453^2 + 297^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 12011418.

It is not an unprimeable number, because it can be changed into a prime (12011411) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4048 + ... + 6356.

Almost surely, 2^12011418 is an apocalyptic number.

12011418 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 12011418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13828815).

12011418 is an abundant number, since it is smaller than the sum of its proper divisors (15646212).

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

12011418 is a wasteful number, since it uses less digits than its factorization.

12011418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351 (or 2331 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 12011418 is about 3465.7492696385. The cubic root of 12011418 is about 229.0154385325.

Adding to 12011418 its reverse (81411021), we get a palindrome (93422439).

The spelling of 12011418 in words is "twelve million, eleven thousand, four hundred eighteen".