20168518367017 has 8 divisors (see below), whose sum is σ = 20241560574216. Its totient is φ = 20095477827072.

The previous prime is 20168518367009. The next prime is 20168518367027. The reversal of 20168518367017 is 71076381586102.

It can be written as a sum of positive squares in 4 ways, for example, as 724466536336 + 19444051830681 = 851156^2 + 4409541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20168518367017 - 2³ = 20168518367009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20168518367027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27103833 + ... + 27838009.

It is an arithmetic number, because the mean of its divisors is an integer number (2530195071777).

Almost surely, 2^{20168518367017} is an apocalyptic number.

It is an amenable number.

20168518367017 is a deficient number, since it is larger than the sum of its proper divisors (73042207199).

20168518367017 is an equidigital number, since it uses as much as digits as its factorization.

20168518367017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833627.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 20168518367017 in words is "twenty trillion, one hundred sixty-eight billion, five hundred eighteen million, three hundred sixty-seven thousand, seventeen".