18959441608 has 16 divisors (see below), whose sum is σ = 35562937500. Its totient is φ = 9475991616.

The previous prime is 18959441591. The next prime is 18959441629. The reversal of 18959441608 is 80614495981.

It can be written as a sum of positive squares in 2 ways, for example, as 16905720484 + 2053721124 = 130022^2 + 45318^2 .

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, 444483 + ... + 485266.

Almost surely, 2^18959441608 is an apocalyptic number.

It is an amenable number.

18959441608 is a deficient number, since it is larger than the sum of its proper divisors (16603495892).

18959441608 is a wasteful number, since it uses less digits than its factorization.

18959441608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932304 (or 932300 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 18959441608 in words is "eighteen billion, nine hundred fifty-nine million, four hundred forty-one thousand, six hundred eight".