18559936064 has 14 divisors (see below), whose sum is σ = 36829873254. Its totient is φ = 9279968000.

The previous prime is 18559936063. The next prime is 18559936093. The reversal of 18559936064 is 46063995581.

It can be written as a sum of positive squares in only one way, i.e., 15278937664 + 3280998400 = 123608^2 + 57280^2 .

It is not an unprimeable number, because it can be changed into a prime (18559936063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144999437 + ... + 144999564.

Almost surely, 2^18559936064 is an apocalyptic number.

It is an amenable number.

18559936064 is a deficient number, since it is larger than the sum of its proper divisors (18269937190).

18559936064 is an equidigital number, since it uses as much as digits as its factorization.

18559936064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289999013 (or 289999003 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 56.

The spelling of 18559936064 in words is "eighteen billion, five hundred fifty-nine million, nine hundred thirty-six thousand, sixty-four".