12820343240 has 64 divisors (see below), whose sum is σ = 28976650560. Its totient is φ = 5104938240.

The previous prime is 12820343197. The next prime is 12820343273. The reversal of 12820343240 is 4234302821.

It is a super-2 number, since 2×12820343240² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12858422 + ... + 12859418.

It is an arithmetic number, because the mean of its divisors is an integer number (452760165).

Almost surely, 2^12820343240 is an apocalyptic number.

12820343240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12820343240 is an abundant number, since it is smaller than the sum of its proper divisors (16156307320).

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

12820343240 is a wasteful number, since it uses less digits than its factorization.

12820343240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142 (or 2138 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The spelling of 12820343240 in words is "twelve billion, eight hundred twenty million, three hundred forty-three thousand, two hundred forty".