12438083421 has 12 divisors (see below), whose sum is σ = 17969509948. Its totient is φ = 8290491264.

The previous prime is 12438083401. The next prime is 12438083461.

It is a happy number.

12438083421 is a `hidden beast` number, since 124 + 38 + 0 + 83 + 421 = 666.

12438083421 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 8027264025 + 4410819396 = 89595^2 + 66414^2 .

It is not a de Polignac number, because 12438083421 - 2⁵ = 12438083389 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 (12438083401) 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, 78940 + ... + 176373.

Almost surely, 2^12438083421 is an apocalyptic number.

It is an amenable number.

12438083421 is a deficient number, since it is larger than the sum of its proper divisors (5531426527).

12438083421 is a wasteful number, since it uses less digits than its factorization.

12438083421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260732 (or 260729 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 12438083421 in words is "twelve billion, four hundred thirty-eight million, eighty-three thousand, four hundred twenty-one".