20004356634217 has 2 divisors, whose sum is σ = 20004356634218. Its totient is φ = 20004356634216.

The previous prime is 20004356634167. The next prime is 20004356634337. The reversal of 20004356634217 is 71243665340002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18634382363536 + 1369974270681 = 4316756^2 + 1170459^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004356634217 - 2⁴³ = 11208263612009 is a prime.

It is not a weakly prime, because it can be changed into another prime (20004356614217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002178317108 + 10002178317109.

It is an arithmetic number, because the mean of its divisors is an integer number (10002178317109).

Almost surely, 2^{20004356634217} is an apocalyptic number.

It is an amenable number.

20004356634217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004356634217 is an equidigital number, since it uses as much as digits as its factorization.

20004356634217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 20004356634217 in words is "twenty trillion, four billion, three hundred fifty-six million, six hundred thirty-four thousand, two hundred seventeen".