20256047061 has 16 divisors (see below), whose sum is σ = 27358214400. Its totient is φ = 13329059328.

The previous prime is 20256047039. The next prime is 20256047093. The reversal of 20256047061 is 16074065202.

It is not a de Polignac number, because 20256047061 - 2⁹ = 20256046549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20256057061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 910705 + ... + 932681.

It is an arithmetic number, because the mean of its divisors is an integer number (1709888400).

Almost surely, 2^20256047061 is an apocalyptic number.

It is an amenable number.

20256047061 is a deficient number, since it is larger than the sum of its proper divisors (7102167339).

20256047061 is a wasteful number, since it uses less digits than its factorization.

20256047061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25948.

The product of its (nonzero) digits is 20160, while the sum is 33.

The spelling of 20256047061 in words is "twenty billion, two hundred fifty-six million, forty-seven thousand, sixty-one".