12820457934 has 24 divisors (see below), whose sum is σ = 27779740560. Its totient is φ = 4273165728.

The previous prime is 12820457887. The next prime is 12820457941. The reversal of 12820457934 is 43975402821.

12820457934 is a `hidden beast` number, since 1 + 28 + 20 + 4 + 579 + 34 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 12820457934.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 466282 + ... + 493010.

It is an arithmetic number, because the mean of its divisors is an integer number (1157489190).

Almost surely, 2^12820457934 is an apocalyptic number.

12820457934 is an abundant number, since it is smaller than the sum of its proper divisors (14959282626).

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

12820457934 is a wasteful number, since it uses less digits than its factorization.

12820457934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53384 (or 53381 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 12820457934 in words is "twelve billion, eight hundred twenty million, four hundred fifty-seven thousand, nine hundred thirty-four".