12820547727 has 20 divisors (see below), whose sum is σ = 20624890440. Its totient is φ = 7889567184.

The previous prime is 12820547699. The next prime is 12820547759. The reversal of 12820547727 is 72774502821.

12820547727 is a `hidden beast` number, since 1 + 2 + 82 + 0 + 547 + 7 + 27 = 666.

It is not a de Polignac number, because 12820547727 - 2¹⁴ = 12820531343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12820547777) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6086577 + ... + 6088682.

It is an arithmetic number, because the mean of its divisors is an integer number (1031244522).

Almost surely, 2^12820547727 is an apocalyptic number.

12820547727 is a deficient number, since it is larger than the sum of its proper divisors (7804342713).

12820547727 is a wasteful number, since it uses less digits than its factorization.

12820547727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12175284 (or 12175275 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 45.

The spelling of 12820547727 in words is "twelve billion, eight hundred twenty million, five hundred forty-seven thousand, seven hundred twenty-seven".