20354740566071 has 2 divisors, whose sum is σ = 20354740566072. Its totient is φ = 20354740566070.

The previous prime is 20354740566037. The next prime is 20354740566073. The reversal of 20354740566071 is 17066504745302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20354740566071 - 2²⁶ = 20354673457207 is a prime.

Together with 20354740566073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20354740566073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177370283035 + 10177370283036.

It is an arithmetic number, because the mean of its divisors is an integer number (10177370283036).

Almost surely, 2^{20354740566071} is an apocalyptic number.

20354740566071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354740566071 is an equidigital number, since it uses as much as digits as its factorization.

20354740566071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4233600, while the sum is 50.

The spelling of 20354740566071 in words is "twenty trillion, three hundred fifty-four billion, seven hundred forty million, five hundred sixty-six thousand, seventy-one".