20202011850217 has 2 divisors, whose sum is σ = 20202011850218. Its totient is φ = 20202011850216.

The previous prime is 20202011850187. The next prime is 20202011850263. The reversal of 20202011850217 is 71205811020202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15206692979776 + 4995318870441 = 3899576^2 + 2235021^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202011850217 - 2⁷ = 20202011850089 is a prime.

It is not a weakly prime, because it can be changed into another prime (20202011850817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101005925108 + 10101005925109.

It is an arithmetic number, because the mean of its divisors is an integer number (10101005925109).

Almost surely, 2^{20202011850217} is an apocalyptic number.

It is an amenable number.

20202011850217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202011850217 is an equidigital number, since it uses as much as digits as its factorization.

20202011850217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 31.

Adding to 20202011850217 its reverse (71205811020202), we get a palindrome (91407822870419).

The spelling of 20202011850217 in words is "twenty trillion, two hundred two billion, eleven million, eight hundred fifty thousand, two hundred seventeen".