13320505145 has 4 divisors (see below), whose sum is σ = 15984606180. Its totient is φ = 10656404112.

The previous prime is 13320505117. The next prime is 13320505147. The reversal of 13320505145 is 54150502331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7922958121 + 5397547024 = 89011^2 + 73468^2 .

It is a cyclic number.

It is not a de Polignac number, because 13320505145 - 2²⁰ = 13319456569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13320505147) 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, 1332050510 + ... + 1332050519.

It is an arithmetic number, because the mean of its divisors is an integer number (3996151545).

Almost surely, 2^13320505145 is an apocalyptic number.

It is an amenable number.

13320505145 is a deficient number, since it is larger than the sum of its proper divisors (2664101035).

13320505145 is an equidigital number, since it uses as much as digits as its factorization.

13320505145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664101034.

The product of its (nonzero) digits is 9000, while the sum is 29.

The spelling of 13320505145 in words is "thirteen billion, three hundred twenty million, five hundred five thousand, one hundred forty-five".