13018271909 has 2 divisors, whose sum is σ = 13018271910. Its totient is φ = 13018271908.

The previous prime is 13018271831. The next prime is 13018271939. The reversal of 13018271909 is 90917281031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12916322500 + 101949409 = 113650^2 + 10097^2 .

It is an emirp because it is prime and its reverse (90917281031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13018271909 - 2²⁰ = 13017223333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13018271939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6509135954 + 6509135955.

It is an arithmetic number, because the mean of its divisors is an integer number (6509135955).

Almost surely, 2^13018271909 is an apocalyptic number.

It is an amenable number.

13018271909 is a deficient number, since it is larger than the sum of its proper divisors (1).

13018271909 is an equidigital number, since it uses as much as digits as its factorization.

13018271909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The spelling of 13018271909 in words is "thirteen billion, eighteen million, two hundred seventy-one thousand, nine hundred nine".