18706252205 has 4 divisors (see below), whose sum is σ = 22447502652. Its totient is φ = 14965001760.

The previous prime is 18706252189. The next prime is 18706252223. The reversal of 18706252205 is 50225260781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9501960484 + 9204291721 = 97478^2 + 95939^2 .

It is not a de Polignac number, because 18706252205 - 2⁴ = 18706252189 is a prime.

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, 1870625216 + ... + 1870625225.

It is an arithmetic number, because the mean of its divisors is an integer number (5611875663).

Almost surely, 2^18706252205 is an apocalyptic number.

It is an amenable number.

18706252205 is a deficient number, since it is larger than the sum of its proper divisors (3741250447).

18706252205 is an equidigital number, since it uses as much as digits as its factorization.

18706252205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3741250446.

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 18706252205 in words is "eighteen billion, seven hundred six million, two hundred fifty-two thousand, two hundred five".