19604338009 has 4 divisors (see below), whose sum is σ = 19604619216. Its totient is φ = 19604056804.

The previous prime is 19604338007. The next prime is 19604338049. The reversal of 19604338009 is 90083340691.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 19604338009 - 2¹ = 19604338007 is a prime.

It is a super-2 number, since 2×19604338009² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19604338007) 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, 51042 + ... + 204484.

It is an arithmetic number, because the mean of its divisors is an integer number (4901154804).

Almost surely, 2^19604338009 is an apocalyptic number.

It is an amenable number.

19604338009 is a deficient number, since it is larger than the sum of its proper divisors (281207).

19604338009 is a wasteful number, since it uses less digits than its factorization.

19604338009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281206.

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 19604338009 in words is "nineteen billion, six hundred four million, three hundred thirty-eight thousand, nine".