12011618 has 8 divisors (see below), whose sum is σ = 18220140. Its totient is φ = 5938240.

The previous prime is 12011617. The next prime is 12011621. The reversal of 12011618 is 81611021.

It can be written as a sum of positive squares in 2 ways, for example, as 11744329 + 267289 = 3427^2 + 517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12011618.

It is not an unprimeable number, because it can be changed into a prime (12011611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33563 + ... + 33918.

Almost surely, 2^12011618 is an apocalyptic number.

12011618 is a deficient number, since it is larger than the sum of its proper divisors (6208522).

12011618 is an equidigital number, since it uses as much as digits as its factorization.

12011618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67572.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 12011618 is about 3465.7781233080. The cubic root of 12011618 is about 229.0167096240.

Adding to 12011618 its reverse (81611021), we get a palindrome (93622639).

The spelling of 12011618 in words is "twelve million, eleven thousand, six hundred eighteen".