20117553365047 has 2 divisors, whose sum is σ = 20117553365048. Its totient is φ = 20117553365046.

The previous prime is 20117553364999. The next prime is 20117553365093. The reversal of 20117553365047 is 74056335571102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20117553365047 - 2⁷ = 20117553364919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20117553365447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058776682523 + 10058776682524.

It is an arithmetic number, because the mean of its divisors is an integer number (10058776682524).

Almost surely, 2^{20117553365047} is an apocalyptic number.

20117553365047 is a deficient number, since it is larger than the sum of its proper divisors (1).

20117553365047 is an equidigital number, since it uses as much as digits as its factorization.

20117553365047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646000, while the sum is 49.

The spelling of 20117553365047 in words is "twenty trillion, one hundred seventeen billion, five hundred fifty-three million, three hundred sixty-five thousand, forty-seven".