12820573456 has 20 divisors (see below), whose sum is σ = 26147222800. Its totient is φ = 6072903072.

The previous prime is 12820573439. The next prime is 12820573457. The reversal of 12820573456 is 65437502821.

It is not an unprimeable number, because it can be changed into a prime (12820573457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21086166 + ... + 21086773.

It is an arithmetic number, because the mean of its divisors is an integer number (1307361140).

Almost surely, 2^12820573456 is an apocalyptic number.

12820573456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12820573456 is an abundant number, since it is smaller than the sum of its proper divisors (13326649344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12820573456 is a wasteful number, since it uses less digits than its factorization.

12820573456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42172966 (or 42172960 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 12820573456 in words is "twelve billion, eight hundred twenty million, five hundred seventy-three thousand, four hundred fifty-six".