19434435089 has 4 divisors (see below), whose sum is σ = 19483388724. Its totient is φ = 19385481456.

The previous prime is 19434435047. The next prime is 19434435103. The reversal of 19434435089 is 98053443491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6429313489 + 13005121600 = 80183^2 + 114040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19434435089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19434435389) 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, 24476222 + ... + 24477015.

It is an arithmetic number, because the mean of its divisors is an integer number (4870847181).

Almost surely, 2^19434435089 is an apocalyptic number.

It is an amenable number.

19434435089 is a deficient number, since it is larger than the sum of its proper divisors (48953635).

19434435089 is an equidigital number, since it uses as much as digits as its factorization.

19434435089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48953634.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 19434435089 in words is "nineteen billion, four hundred thirty-four million, four hundred thirty-five thousand, eighty-nine".