17205002005 has 4 divisors (see below), whose sum is σ = 20646002412. Its totient is φ = 13764001600.

The previous prime is 17205001967. The next prime is 17205002011. The reversal of 17205002005 is 50020050271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50020050271 = 439 ⋅113940889.

It can be written as a sum of positive squares in 2 ways, for example, as 5455742769 + 11749259236 = 73863^2 + 108394^2 .

It is not a de Polignac number, because 17205002005 - 2²¹ = 17202904853 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1720500196 + ... + 1720500205.

It is an arithmetic number, because the mean of its divisors is an integer number (5161500603).

Almost surely, 2^17205002005 is an apocalyptic number.

It is an amenable number.

17205002005 is a deficient number, since it is larger than the sum of its proper divisors (3441000407).

17205002005 is an equidigital number, since it uses as much as digits as its factorization.

17205002005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441000406.

The product of its (nonzero) digits is 700, while the sum is 22.

Adding to 17205002005 its reverse (50020050271), we get a palindrome (67225052276).

The spelling of 17205002005 in words is "seventeen billion, two hundred five million, two thousand, five".