20256750659767 has 2 divisors, whose sum is σ = 20256750659768. Its totient is φ = 20256750659766.

The previous prime is 20256750659749. The next prime is 20256750659851. The reversal of 20256750659767 is 76795605765202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20256750659767 - 2²⁷ = 20256616442039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20256750659707) 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, 10128375329883 + 10128375329884.

It is an arithmetic number, because the mean of its divisors is an integer number (10128375329884).

Almost surely, 2^{20256750659767} is an apocalyptic number.

20256750659767 is a deficient number, since it is larger than the sum of its proper divisors (1).

20256750659767 is an equidigital number, since it uses as much as digits as its factorization.

20256750659767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 333396000, while the sum is 67.

The spelling of 20256750659767 in words is "twenty trillion, two hundred fifty-six billion, seven hundred fifty million, six hundred fifty-nine thousand, seven hundred sixty-seven".