13204109817 has 6 divisors (see below), whose sum is σ = 19072603082. Its totient is φ = 8802739872.

The previous prime is 13204109801. The next prime is 13204109827. The reversal of 13204109817 is 71890140231.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12093620841 + 1110488976 = 109971^2 + 33324^2 .

It is not a de Polignac number, because 13204109817 - 2⁴ = 13204109801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13204109827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 733561648 + ... + 733561665.

Almost surely, 2^13204109817 is an apocalyptic number.

It is an amenable number.

13204109817 is a deficient number, since it is larger than the sum of its proper divisors (5868493265).

13204109817 is a wasteful number, since it uses less digits than its factorization.

13204109817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467123319 (or 1467123316 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 13204109817 in words is "thirteen billion, two hundred four million, one hundred nine thousand, eight hundred seventeen".