12820585829 has 4 divisors (see below), whose sum is σ = 12833523840. Its totient is φ = 12807647820.

The previous prime is 12820585823. The next prime is 12820585859. The reversal of 12820585829 is 92858502821.

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 a de Polignac number, because none of the positive numbers 2^k-12820585829 is a prime.

It is a super-3 number, since 3×12820585829³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12820585823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6467519 + ... + 6469500.

It is an arithmetic number, because the mean of its divisors is an integer number (3208380960).

Almost surely, 2^12820585829 is an apocalyptic number.

It is an amenable number.

12820585829 is a deficient number, since it is larger than the sum of its proper divisors (12938011).

12820585829 is an equidigital number, since it uses as much as digits as its factorization.

12820585829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12938010.

The product of its (nonzero) digits is 921600, while the sum is 50.

The spelling of 12820585829 in words is "twelve billion, eight hundred twenty million, five hundred eighty-five thousand, eight hundred twenty-nine".