12820708044 has 18 divisors (see below), whose sum is σ = 32407900980. Its totient is φ = 4273569336.

The previous prime is 12820708031. The next prime is 12820708057. The reversal of 12820708044 is 44080702821.

It is an interprime number because it is at equal distance from previous prime (12820708031) and next prime (12820708057).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 356130779 = 12820708044 / (1 + 2 + 8 + 2 + 0 + 7 + 0 + 8 + 0 + 4 + 4).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 178065354 + ... + 178065425.

Almost surely, 2^12820708044 is an apocalyptic number.

It is an amenable number.

12820708044 is an abundant number, since it is smaller than the sum of its proper divisors (19587192936).

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

12820708044 is a wasteful number, since it uses less digits than its factorization.

12820708044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356130789 (or 356130784 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The spelling of 12820708044 in words is "twelve billion, eight hundred twenty million, seven hundred eight thousand, forty-four".