12018671 has 6 divisors (see below), whose sum is σ = 13980960. Its totient is φ = 10301676.

The previous prime is 12018653. The next prime is 12018679. The reversal of 12018671 is 17681021.

It is a de Polignac number, because none of the positive numbers 2^k-12018671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12018671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12018679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122591 + ... + 122688.

It is an arithmetic number, because the mean of its divisors is an integer number (2330160).

Almost surely, 2^12018671 is an apocalyptic number.

12018671 is a deficient number, since it is larger than the sum of its proper divisors (1962289).

12018671 is an equidigital number, since it uses as much as digits as its factorization.

12018671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245293 (or 245286 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 12018671 is about 3466.7954944011. The cubic root of 12018671 is about 229.0615256459.

Adding to 12018671 its reverse (17681021), we get a palindrome (29699692).

The spelling of 12018671 in words is "twelve million, eighteen thousand, six hundred seventy-one".