18794837689 has 4 divisors (see below), whose sum is σ = 19113394320. Its totient is φ = 18476281060.

The previous prime is 18794837671. The next prime is 18794837701. The reversal of 18794837689 is 98673849781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18794837689 - 2⁵ = 18794837657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18794837629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159278227 + ... + 159278344.

It is an arithmetic number, because the mean of its divisors is an integer number (4778348580).

Almost surely, 2^18794837689 is an apocalyptic number.

It is an amenable number.

18794837689 is a deficient number, since it is larger than the sum of its proper divisors (318556631).

18794837689 is an equidigital number, since it uses as much as digits as its factorization.

18794837689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318556630.

The product of its digits is 146313216, while the sum is 70.

The spelling of 18794837689 in words is "eighteen billion, seven hundred ninety-four million, eight hundred thirty-seven thousand, six hundred eighty-nine".