12436168431 has 4 divisors (see below), whose sum is σ = 16581557912. Its totient is φ = 8290778952.

The previous prime is 12436168429. The next prime is 12436168469. The reversal of 12436168431 is 13486163421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12436168431 - 2¹ = 12436168429 is a prime.

It is a super-2 number, since 2×12436168431² (a number of 21 digits) contains 22 as substring.

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 12436168431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12436164431) 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, 2072694736 + ... + 2072694741.

It is an arithmetic number, because the mean of its divisors is an integer number (4145389478).

Almost surely, 2^12436168431 is an apocalyptic number.

12436168431 is a deficient number, since it is larger than the sum of its proper divisors (4145389481).

12436168431 is an equidigital number, since it uses as much as digits as its factorization.

12436168431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4145389480.

The product of its digits is 82944, while the sum is 39.

The spelling of 12436168431 in words is "twelve billion, four hundred thirty-six million, one hundred sixty-eight thousand, four hundred thirty-one".