12018917 has 4 divisors (see below), whose sum is σ = 12406656. Its totient is φ = 11631180.

The previous prime is 12018907. The next prime is 12018931. The reversal of 12018917 is 71981021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12018917 - 2⁴ = 12018901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12018917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12018907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193823 + ... + 193884.

It is an arithmetic number, because the mean of its divisors is an integer number (3101664).

Almost surely, 2^12018917 is an apocalyptic number.

It is an amenable number.

12018917 is a deficient number, since it is larger than the sum of its proper divisors (387739).

12018917 is an equidigital number, since it uses as much as digits as its factorization.

12018917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387738.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 12018917 is about 3466.8309736703. The cubic root of 12018917 is about 229.0630884574.

Adding to 12018917 its reverse (71981021), we get a palindrome (83999938).

The spelling of 12018917 in words is "twelve million, eighteen thousand, nine hundred seventeen".