12436463421 has 12 divisors (see below), whose sum is σ = 18449288572. Its totient is φ = 8066894976.

The previous prime is 12436463393. The next prime is 12436463461.

12436463421 is a `hidden beast` number, since 1 + 2 + 4 + 3 + 646 + 3 + 4 + 2 + 1 = 666.

12436463421 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 8510062500 + 3926400921 = 92250^2 + 62661^2 .

It is not a de Polignac number, because 12436463421 - 2³⁰ = 11362721597 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 (12436463461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18673036 + ... + 18673701.

Almost surely, 2^12436463421 is an apocalyptic number.

It is an amenable number.

12436463421 is a deficient number, since it is larger than the sum of its proper divisors (6012825151).

12436463421 is a wasteful number, since it uses less digits than its factorization.

12436463421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37346780 (or 37346777 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The spelling of 12436463421 in words is "twelve billion, four hundred thirty-six million, four hundred sixty-three thousand, four hundred twenty-one".