12821485869 has 20 divisors (see below), whose sum is σ = 19208322144. Its totient is φ = 8523005544.

The previous prime is 12821485841. The next prime is 12821485877. The reversal of 12821485869 is 96858412821.

12821485869 is a `hidden beast` number, since 1 + 2 + 82 + 1 + 485 + 86 + 9 = 666.

It is not a de Polignac number, because 12821485869 - 2¹¹ = 12821483821 is a prime.

It is a super-2 number, since 2×12821485869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12821485819) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 199977 + ... + 256190.

Almost surely, 2^12821485869 is an apocalyptic number.

It is an amenable number.

12821485869 is a deficient number, since it is larger than the sum of its proper divisors (6386836275).

12821485869 is an equidigital number, since it uses as much as digits as its factorization.

12821485869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456526 (or 456517 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The spelling of 12821485869 in words is "twelve billion, eight hundred twenty-one million, four hundred eighty-five thousand, eight hundred sixty-nine".