20353503500017 has 2 divisors, whose sum is σ = 20353503500018. Its totient is φ = 20353503500016.

The previous prime is 20353503499999. The next prime is 20353503500027. The reversal of 20353503500017 is 71000530535302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13358118575376 + 6995384924641 = 3654876^2 + 2644879^2 .

It is a cyclic number.

It is not a de Polignac number, because 20353503500017 - 2¹¹ = 20353503497969 is a prime.

It is not a weakly prime, because it can be changed into another prime (20353503500027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10176751750008 + 10176751750009.

It is an arithmetic number, because the mean of its divisors is an integer number (10176751750009).

Almost surely, 2^{20353503500017} is an apocalyptic number.

It is an amenable number.

20353503500017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20353503500017 is an equidigital number, since it uses as much as digits as its factorization.

20353503500017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47250, while the sum is 34.

The spelling of 20353503500017 in words is "twenty trillion, three hundred fifty-three billion, five hundred three million, five hundred thousand, seventeen".