12834843821 has 4 divisors (see below), whose sum is σ = 13589834652. Its totient is φ = 12079852992.

The previous prime is 12834843779. The next prime is 12834843823.

12834843821 is nontrivially palindromic in base 10.

12834843821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7803778921 + 5031064900 = 88339^2 + 70930^2 .

It is a cyclic number.

It is not a de Polignac number, because 12834843821 - 2⁶ = 12834843757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12834843823) 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 3 ways as a sum of consecutive naturals, for example, 377495390 + ... + 377495423.

It is an arithmetic number, because the mean of its divisors is an integer number (3397458663).

Almost surely, 2^12834843821 is an apocalyptic number.

It is an amenable number.

12834843821 is a deficient number, since it is larger than the sum of its proper divisors (754990831).

12834843821 is an equidigital number, since it uses as much as digits as its factorization.

12834843821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754990830.

The product of its digits is 294912, while the sum is 44.

The spelling of 12834843821 in words is "twelve billion, eight hundred thirty-four million, eight hundred forty-three thousand, eight hundred twenty-one".