18447108441085 has 8 divisors (see below), whose sum is σ = 22139198195256. Its totient is φ = 14755908042240.

The previous prime is 18447108441079. The next prime is 18447108441137. The reversal of 18447108441085 is 58014480174481.

It can be written as a sum of positive squares in 4 ways, for example, as 5306969186596 + 13140139254489 = 2303686^2 + 3624933^2 .

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

It is not a de Polignac number, because 18447108441085 - 2²⁷ = 18446974223357 is a prime.

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, 222293196 + ... + 222376165.

It is an arithmetic number, because the mean of its divisors is an integer number (2767399774407).

Almost surely, 2^{18447108441085} is an apocalyptic number.

It is an amenable number.

18447108441085 is a deficient number, since it is larger than the sum of its proper divisors (3692089754171).

18447108441085 is an equidigital number, since it uses as much as digits as its factorization.

18447108441085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444677663.

The product of its (nonzero) digits is 4587520, while the sum is 55.

The spelling of 18447108441085 in words is "eighteen trillion, four hundred forty-seven billion, one hundred eight million, four hundred forty-one thousand, eighty-five".