13220193809 has 2 divisors, whose sum is σ = 13220193810. Its totient is φ = 13220193808.

The previous prime is 13220193751. The next prime is 13220193821. The reversal of 13220193809 is 90839102231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12310568209 + 909625600 = 110953^2 + 30160^2 .

It is a cyclic number.

It is not a de Polignac number, because 13220193809 - 2¹² = 13220189713 is a prime.

It is not a weakly prime, because it can be changed into another prime (13220198809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610096904 + 6610096905.

It is an arithmetic number, because the mean of its divisors is an integer number (6610096905).

Almost surely, 2^13220193809 is an apocalyptic number.

It is an amenable number.

13220193809 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220193809 is an equidigital number, since it uses as much as digits as its factorization.

13220193809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 13220193809 in words is "thirteen billion, two hundred twenty million, one hundred ninety-three thousand, eight hundred nine".