18935682689 has 8 divisors (see below), whose sum is σ = 23608123968. Its totient is φ = 14755077360.

The previous prime is 18935682653. The next prime is 18935682691. The reversal of 18935682689 is 98628653981.

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

It is a cyclic number.

It is not a de Polignac number, because 18935682689 - 2²⁰ = 18934634113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18935682589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122958902 + ... + 122959055.

It is an arithmetic number, because the mean of its divisors is an integer number (2951015496).

Almost surely, 2^18935682689 is an apocalyptic number.

It is an amenable number.

18935682689 is a deficient number, since it is larger than the sum of its proper divisors (4672441279).

18935682689 is a wasteful number, since it uses less digits than its factorization.

18935682689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245917975.

The product of its digits is 44789760, while the sum is 65.

The spelling of 18935682689 in words is "eighteen billion, nine hundred thirty-five million, six hundred eighty-two thousand, six hundred eighty-nine".