18471845305 has 4 divisors (see below), whose sum is σ = 22166214372. Its totient is φ = 14777476240.

The previous prime is 18471845279. The next prime is 18471845351. The reversal of 18471845305 is 50354817481.

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 14015481769 + 4456363536 = 118387^2 + 66756^2 .

It is not a de Polignac number, because 18471845305 - 2⁷ = 18471845177 is a prime.

It is a Duffinian 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, 1847184526 + ... + 1847184535.

It is an arithmetic number, because the mean of its divisors is an integer number (5541553593).

Almost surely, 2^18471845305 is an apocalyptic number.

It is an amenable number.

18471845305 is a deficient number, since it is larger than the sum of its proper divisors (3694369067).

18471845305 is an equidigital number, since it uses as much as digits as its factorization.

18471845305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694369066.

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 18471845305 in words is "eighteen billion, four hundred seventy-one million, eight hundred forty-five thousand, three hundred five".