17872086205 has 4 divisors (see below), whose sum is σ = 21446503452. Its totient is φ = 14297668960.

The previous prime is 17872086187. The next prime is 17872086269. The reversal of 17872086205 is 50268027871.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50268027871 = 107 ⋅469794653.

It can be written as a sum of positive squares in 2 ways, for example, as 12763124676 + 5108961529 = 112974^2 + 71477^2 .

It is a de Polignac number, because none of the positive numbers 2^k-17872086205 is a prime.

It is a super-2 number, since 2×17872086205² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1787208616 + ... + 1787208625.

It is an arithmetic number, because the mean of its divisors is an integer number (5361625863).

Almost surely, 2^17872086205 is an apocalyptic number.

It is an amenable number.

17872086205 is a deficient number, since it is larger than the sum of its proper divisors (3574417247).

17872086205 is an equidigital number, since it uses as much as digits as its factorization.

17872086205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574417246.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 17872086205 in words is "seventeen billion, eight hundred seventy-two million, eighty-six thousand, two hundred five".