12820397300 has 18 divisors (see below), whose sum is σ = 27820262358. Its totient is φ = 5128158880.

The previous prime is 12820397281. The next prime is 12820397311. The reversal of 12820397300 is 379302821.

It can be written as a sum of positive squares in 3 ways, for example, as 26977636 + 12793419664 = 5194^2 + 113108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64101887 + ... + 64102086.

It is an arithmetic number, because the mean of its divisors is an integer number (1545570131).

Almost surely, 2^12820397300 is an apocalyptic number.

12820397300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12820397300 is an abundant number, since it is smaller than the sum of its proper divisors (14999865058).

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

12820397300 is a wasteful number, since it uses less digits than its factorization.

12820397300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128203987 (or 128203980 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 12820397300 in words is "twelve billion, eight hundred twenty million, three hundred ninety-seven thousand, three hundred".