12186719893 has 12 divisors (see below), whose sum is σ = 12448036548. Its totient is φ = 11929702400.

The previous prime is 12186719887. The next prime is 12186719899. The reversal of 12186719893 is 39891768121.

It is a happy number.

12186719893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12186719887) and next prime (12186719899).

It can be written as a sum of positive squares in 6 ways, for example, as 631114884 + 11555605009 = 25122^2 + 107497^2 .

It is not a de Polignac number, because 12186719893 - 2²⁵ = 12153165461 is a prime.

It is a super-2 number, since 2×12186719893² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12186719899) 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 11 ways as a sum of consecutive naturals, for example, 792405 + ... + 807637.

It is an arithmetic number, because the mean of its divisors is an integer number (1037336379).

Almost surely, 2^12186719893 is an apocalyptic number.

It is an amenable number.

12186719893 is a deficient number, since it is larger than the sum of its proper divisors (261316655).

12186719893 is an equidigital number, since it uses as much as digits as its factorization.

12186719893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15512 (or 15423 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 55.

The spelling of 12186719893 in words is "twelve billion, one hundred eighty-six million, seven hundred nineteen thousand, eight hundred ninety-three".