18802475171317 has 4 divisors (see below), whose sum is σ = 18802738475820. Its totient is φ = 18802211866816.

The previous prime is 18802475171261. The next prime is 18802475171321. The reversal of 18802475171317 is 71317157420881.

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 417366389521 + 18385108781796 = 646039^2 + 4287786^2 .

It is a cyclic number.

It is not a de Polignac number, because 18802475171317 - 2⁷ = 18802475171189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18802475171377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131545108 + ... + 131687965.

It is an arithmetic number, because the mean of its divisors is an integer number (4700684618955).

Almost surely, 2^{18802475171317} is an apocalyptic number.

It is an amenable number.

18802475171317 is a deficient number, since it is larger than the sum of its proper divisors (263304503).

18802475171317 is an equidigital number, since it uses as much as digits as its factorization.

18802475171317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263304502.

The product of its (nonzero) digits is 2634240, while the sum is 55.

The spelling of 18802475171317 in words is "eighteen trillion, eight hundred two billion, four hundred seventy-five million, one hundred seventy-one thousand, three hundred seventeen".