12018686 has 4 divisors (see below), whose sum is σ = 18028032. Its totient is φ = 6009342.

The previous prime is 12018683. The next prime is 12018703. The reversal of 12018686 is 68681021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68681021 = 1279 ⋅53699.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12018683) 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 as a sum of consecutive naturals, namely, 3004670 + ... + 3004673.

It is an arithmetic number, because the mean of its divisors is an integer number (4507008).

Almost surely, 2^12018686 is an apocalyptic number.

12018686 is a deficient number, since it is larger than the sum of its proper divisors (6009346).

12018686 is an equidigital number, since it uses as much as digits as its factorization.

12018686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6009345.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 12018686 is about 3466.7976577816. The cubic root of 12018686 is about 229.0616209399.

The spelling of 12018686 in words is "twelve million, eighteen thousand, six hundred eighty-six".