12837285821 has 4 divisors (see below), whose sum is σ = 12837580512. Its totient is φ = 12836991132.

The previous prime is 12837285809. The next prime is 12837285823. The reversal of 12837285821 is 12858273821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12837285821 - 2²⁶ = 12770176957 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 (12837285823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67625 + ... + 173918.

It is an arithmetic number, because the mean of its divisors is an integer number (3209395128).

Almost surely, 2^12837285821 is an apocalyptic number.

It is an amenable number.

12837285821 is a deficient number, since it is larger than the sum of its proper divisors (294691).

12837285821 is an equidigital number, since it uses as much as digits as its factorization.

12837285821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294690.

The product of its digits is 430080, while the sum is 47.

The spelling of 12837285821 in words is "twelve billion, eight hundred thirty-seven million, two hundred eighty-five thousand, eight hundred twenty-one".