12820579984 has 15 divisors (see below), whose sum is σ = 24840751267. Its totient is φ = 6410063536.

The previous prime is 12820579949. The next prime is 12820579987. The reversal of 12820579984 is 48997502821.

The square root of 12820579984 is 113228.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×12820579984² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12820579987) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 438759 + ... + 467065.

Almost surely, 2^12820579984 is an apocalyptic number.

12820579984 is the 113228-th square number.

It is an amenable number.

12820579984 is a deficient number, since it is larger than the sum of its proper divisors (12020171283).

12820579984 is an frugal number, since it uses more digits than its factorization.

12820579984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56622 (or 28309 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 12820579984 in words is "twelve billion, eight hundred twenty million, five hundred seventy-nine thousand, nine hundred eighty-four".