12834043821 has 24 divisors (see below), whose sum is σ = 18903588704. Its totient is φ = 8388243360.

The previous prime is 12834043793. The next prime is 12834043837.

It is a happy number.

12834043821 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12834043821 - 2⁷ = 12834043693 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 (12834043921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130470 + ... + 206616.

Almost surely, 2^12834043821 is an apocalyptic number.

It is an amenable number.

12834043821 is a deficient number, since it is larger than the sum of its proper divisors (6069544883).

12834043821 is a wasteful number, since it uses less digits than its factorization.

12834043821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76521 (or 76518 counting only the distinct ones).

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

The spelling of 12834043821 in words is "twelve billion, eight hundred thirty-four million, forty-three thousand, eight hundred twenty-one".