12011818 has 32 divisors (see below), whose sum is σ = 22901760. Its totient is φ = 4596480.

The previous prime is 12011807. The next prime is 12011821. The reversal of 12011818 is 81811021.

12011818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 4578 + ... + 6706.

It is an arithmetic number, because the mean of its divisors is an integer number (715680).

Almost surely, 2^12011818 is an apocalyptic number.

12011818 is a deficient number, since it is larger than the sum of its proper divisors (10889942).

12011818 is a wasteful number, since it uses less digits than its factorization.

12011818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182.

The product of its (nonzero) digits is 128, while the sum is 22.

The square root of 12011818 is about 3465.8069767372. The cubic root of 12011818 is about 229.0179807014.

Adding to 12011818 its reverse (81811021), we get a palindrome (93822839).

The spelling of 12011818 in words is "twelve million, eleven thousand, eight hundred eighteen".