18850545475205 has 4 divisors (see below), whose sum is σ = 22620654570252. Its totient is φ = 15080436380160.

The previous prime is 18850545475141. The next prime is 18850545475219. The reversal of 18850545475205 is 50257454505881.

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 10040488580929 + 8810056894276 = 3168673^2 + 2968174^2 .

It is not a de Polignac number, because 18850545475205 - 2⁶ = 18850545475141 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, 1885054547516 + ... + 1885054547525.

It is an arithmetic number, because the mean of its divisors is an integer number (5655163642563).

Almost surely, 2^{18850545475205} is an apocalyptic number.

It is an amenable number.

18850545475205 is a deficient number, since it is larger than the sum of its proper divisors (3770109095047).

18850545475205 is an equidigital number, since it uses as much as digits as its factorization.

18850545475205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770109095046.

The product of its (nonzero) digits is 44800000, while the sum is 59.

The spelling of 18850545475205 in words is "eighteen trillion, eight hundred fifty billion, five hundred forty-five million, four hundred seventy-five thousand, two hundred five".