13043020209 has 4 divisors (see below), whose sum is σ = 17390693616. Its totient is φ = 8695346804.

The previous prime is 13043020171. The next prime is 13043020217. The reversal of 13043020209 is 90202034031.

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-13043020209 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13043020009) 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, 2173836699 + ... + 2173836704.

It is an arithmetic number, because the mean of its divisors is an integer number (4347673404).

Almost surely, 2^13043020209 is an apocalyptic number.

It is an amenable number.

13043020209 is a deficient number, since it is larger than the sum of its proper divisors (4347673407).

13043020209 is an equidigital number, since it uses as much as digits as its factorization.

13043020209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4347673406.

The product of its (nonzero) digits is 1296, while the sum is 24.

The spelling of 13043020209 in words is "thirteen billion, forty-three million, twenty thousand, two hundred nine".