20085774477871 has 2 divisors, whose sum is σ = 20085774477872. Its totient is φ = 20085774477870.

The previous prime is 20085774477833. The next prime is 20085774477889. The reversal of 20085774477871 is 17877447758002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20085774477871 - 2¹⁵ = 20085774445103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20085774477797 and 20085774477806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20085774477371) 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 as a sum of consecutive naturals, namely, 10042887238935 + 10042887238936.

It is an arithmetic number, because the mean of its divisors is an integer number (10042887238936).

Almost surely, 2^{20085774477871} is an apocalyptic number.

20085774477871 is a deficient number, since it is larger than the sum of its proper divisors (1).

20085774477871 is an equidigital number, since it uses as much as digits as its factorization.

20085774477871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172103680, while the sum is 67.

The spelling of 20085774477871 in words is "twenty trillion, eighty-five billion, seven hundred seventy-four million, four hundred seventy-seven thousand, eight hundred seventy-one".