20117105576647 has 2 divisors, whose sum is σ = 20117105576648. Its totient is φ = 20117105576646.

The previous prime is 20117105576569. The next prime is 20117105576651. The reversal of 20117105576647 is 74667550171102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20117105576647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20117105576594 and 20117105576603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20117105576747) 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, 10058552788323 + 10058552788324.

It is an arithmetic number, because the mean of its divisors is an integer number (10058552788324).

Almost surely, 2^{20117105576647} is an apocalyptic number.

20117105576647 is a deficient number, since it is larger than the sum of its proper divisors (1).

20117105576647 is an equidigital number, since it uses as much as digits as its factorization.

20117105576647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2469600, while the sum is 52.

The spelling of 20117105576647 in words is "twenty trillion, one hundred seventeen billion, one hundred five million, five hundred seventy-six thousand, six hundred forty-seven".