18946608608 has 24 divisors (see below), whose sum is σ = 37305714600. Its totient is φ = 9472141440.

The previous prime is 18946608589. The next prime is 18946608623. The reversal of 18946608608 is 80680664981.

It is a congruent 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, 267503 + ... + 330833.

It is an arithmetic number, because the mean of its divisors is an integer number (1554404775).

Almost surely, 2^18946608608 is an apocalyptic number.

It is an amenable number.

18946608608 is a deficient number, since it is larger than the sum of its proper divisors (18359105992).

18946608608 is an equidigital number, since it uses as much as digits as its factorization.

18946608608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72690 (or 72682 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 18946608608 in words is "eighteen billion, nine hundred forty-six million, six hundred eight thousand, six hundred eight".