19434658009 has 32 divisors (see below), whose sum is σ = 23484414240. Its totient is φ = 15904358400.

The previous prime is 19434658007. The next prime is 19434658031. The reversal of 19434658009 is 90085643491.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 3908750400 + 15525907609 = 62520^2 + 124603^2 .

It is a cyclic number.

It is not a de Polignac number, because 19434658009 - 2¹ = 19434658007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19434658007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225789 + ... + 299749.

It is an arithmetic number, because the mean of its divisors is an integer number (733887945).

Almost surely, 2^19434658009 is an apocalyptic number.

It is an amenable number.

19434658009 is a deficient number, since it is larger than the sum of its proper divisors (4049756231).

19434658009 is a wasteful number, since it uses less digits than its factorization.

19434658009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74061.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 19434658009 in words is "nineteen billion, four hundred thirty-four million, six hundred fifty-eight thousand, nine".