19434873089 has 4 divisors (see below), whose sum is σ = 19437094656. Its totient is φ = 19432651524.

The previous prime is 19434873079. The next prime is 19434873181. The reversal of 19434873089 is 98037843491.

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 a de Polignac number, because none of the positive numbers 2^k-19434873089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19434873049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1097609 + ... + 1115174.

It is an arithmetic number, because the mean of its divisors is an integer number (4859273664).

Almost surely, 2^19434873089 is an apocalyptic number.

It is an amenable number.

19434873089 is a deficient number, since it is larger than the sum of its proper divisors (2221567).

19434873089 is an equidigital number, since it uses as much as digits as its factorization.

19434873089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221566.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 19434873089 in words is "nineteen billion, four hundred thirty-four million, eight hundred seventy-three thousand, eighty-nine".