11209394305 has 4 divisors (see below), whose sum is σ = 13451273172. Its totient is φ = 8967515440.

The previous prime is 11209394291. The next prime is 11209394309. The reversal of 11209394305 is 50349390211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50349390211 = 71 ⋅709146341.

It can be written as a sum of positive squares in 2 ways, for example, as 5320827136 + 5888567169 = 72944^2 + 76737^2 .

It is not a de Polignac number, because 11209394305 - 2⁷ = 11209394177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11209394309) 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, 1120939426 + ... + 1120939435.

It is an arithmetic number, because the mean of its divisors is an integer number (3362818293).

Almost surely, 2^11209394305 is an apocalyptic number.

It is an amenable number.

11209394305 is a deficient number, since it is larger than the sum of its proper divisors (2241878867).

11209394305 is an equidigital number, since it uses as much as digits as its factorization.

11209394305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241878866.

The product of its (nonzero) digits is 29160, while the sum is 37.

The spelling of 11209394305 in words is "eleven billion, two hundred nine million, three hundred ninety-four thousand, three hundred five".