20768385047 has 2 divisors, whose sum is σ = 20768385048. Its totient is φ = 20768385046.

The previous prime is 20768385037. The next prime is 20768385059. The reversal of 20768385047 is 74058386702.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20768385047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20768384986 and 20768385004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20768385017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10384192523 + 10384192524.

It is an arithmetic number, because the mean of its divisors is an integer number (10384192524).

Almost surely, 2^20768385047 is an apocalyptic number.

20768385047 is a deficient number, since it is larger than the sum of its proper divisors (1).

20768385047 is an equidigital number, since it uses as much as digits as its factorization.

20768385047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 20768385047 in words is "twenty billion, seven hundred sixty-eight million, three hundred eighty-five thousand, forty-seven".