201868500017 has 2 divisors, whose sum is σ = 201868500018. Its totient is φ = 201868500016.

The previous prime is 201868499993. The next prime is 201868500091. The reversal of 201868500017 is 710005868102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191374751296 + 10493748721 = 437464^2 + 102439^2 .

It is a cyclic number.

It is not a de Polignac number, because 201868500017 - 2¹⁸ = 201868237873 is a prime.

It is a super-2 number, since 2×201868500017² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201868500217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100934250008 + 100934250009.

It is an arithmetic number, because the mean of its divisors is an integer number (100934250009).

Almost surely, 2^201868500017 is an apocalyptic number.

It is an amenable number.

201868500017 is a deficient number, since it is larger than the sum of its proper divisors (1).

201868500017 is an equidigital number, since it uses as much as digits as its factorization.

201868500017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 38.

The spelling of 201868500017 in words is "two hundred one billion, eight hundred sixty-eight million, five hundred thousand, seventeen".