12186659893 has 4 divisors (see below), whose sum is σ = 12312295660. Its totient is φ = 12061024128.

The previous prime is 12186659861. The next prime is 12186659897. The reversal of 12186659893 is 39895668121.

12186659893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39895668121 = 199739².

It can be written as a sum of positive squares in 2 ways, for example, as 7844113489 + 4342546404 = 88567^2 + 65898^2 .

It is a cyclic number.

It is not a de Polignac number, because 12186659893 - 2⁵ = 12186659861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12186659897) 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 3 ways as a sum of consecutive naturals, for example, 62817738 + ... + 62817931.

It is an arithmetic number, because the mean of its divisors is an integer number (3078073915).

Almost surely, 2^12186659893 is an apocalyptic number.

It is an amenable number.

12186659893 is a deficient number, since it is larger than the sum of its proper divisors (125635767).

12186659893 is an equidigital number, since it uses as much as digits as its factorization.

12186659893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125635766.

The product of its digits is 5598720, while the sum is 58.

The spelling of 12186659893 in words is "twelve billion, one hundred eighty-six million, six hundred fifty-nine thousand, eight hundred ninety-three".