20597705727 has 16 divisors (see below), whose sum is σ = 27976111200. Its totient is φ = 13476556800.

The previous prime is 20597705669. The next prime is 20597705731. The reversal of 20597705727 is 72750779502.

It is not a de Polignac number, because 20597705727 - 2¹⁰ = 20597704703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20597705727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20597707727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43174 + ... + 207507.

It is an arithmetic number, because the mean of its divisors is an integer number (1748506950).

Almost surely, 2^20597705727 is an apocalyptic number.

20597705727 is a deficient number, since it is larger than the sum of its proper divisors (7378405473).

20597705727 is a wasteful number, since it uses less digits than its factorization.

20597705727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251194.

The product of its (nonzero) digits is 2160900, while the sum is 51.

The spelling of 20597705727 in words is "twenty billion, five hundred ninety-seven million, seven hundred five thousand, seven hundred twenty-seven".