18842578471418 has 8 divisors (see below), whose sum is σ = 30438011376948. Its totient is φ = 8696574679104.

The previous prime is 18842578471417. The next prime is 18842578471441. The reversal of 18842578471418 is 81417487524881.

It can be written as a sum of positive squares in 2 ways, for example, as 14022081584449 + 4820496886969 = 3744607^2 + 2195563^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18842578471417) by changing a digit.

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, 362357278271 + ... + 362357278322.

Almost surely, 2^{18842578471418} is an apocalyptic number.

18842578471418 is a deficient number, since it is larger than the sum of its proper divisors (11595432905530).

18842578471418 is a wasteful number, since it uses less digits than its factorization.

18842578471418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724714556608.

The product of its digits is 128450560, while the sum is 68.

The spelling of 18842578471418 in words is "eighteen trillion, eight hundred forty-two billion, five hundred seventy-eight million, four hundred seventy-one thousand, four hundred eighteen".