18905317341005 has 8 divisors (see below), whose sum is σ = 22686762828024. Its totient is φ = 15123999193600.

The previous prime is 18905317340989. The next prime is 18905317341011. The reversal of 18905317341005 is 50014371350981.

It can be written as a sum of positive squares in 4 ways, for example, as 82379332324 + 18822938008681 = 287018^2 + 4338541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18905317341005 - 2⁴ = 18905317340989 is a prime.

It is a super-2 number, since 2×18905317341005² (a number of 27 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 7 ways as a sum of consecutive naturals, for example, 31507976 + ... + 32102385.

It is an arithmetic number, because the mean of its divisors is an integer number (2835845353503).

Almost surely, 2^{18905317341005} is an apocalyptic number.

It is an amenable number.

18905317341005 is a deficient number, since it is larger than the sum of its proper divisors (3781445487019).

18905317341005 is an equidigital number, since it uses as much as digits as its factorization.

18905317341005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63669807.

The product of its (nonzero) digits is 453600, while the sum is 47.

Adding to 18905317341005 its reverse (50014371350981), we get a palindrome (68919688691986).

The spelling of 18905317341005 in words is "eighteen trillion, nine hundred five billion, three hundred seventeen million, three hundred forty-one thousand, five".