20345032403305 has 4 divisors (see below), whose sum is σ = 24414038883972. Its totient is φ = 16276025922640.

The previous prime is 20345032403263. The next prime is 20345032403309. The reversal of 20345032403305 is 50330423054302.

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 15372547174656 + 4972485228649 = 3920784^2 + 2229907^2 .

It is not a de Polignac number, because 20345032403305 - 2¹¹ = 20345032401257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345032403309) 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, 2034503240326 + ... + 2034503240335.

It is an arithmetic number, because the mean of its divisors is an integer number (6103509720993).

Almost surely, 2^{20345032403305} is an apocalyptic number.

It is an amenable number.

20345032403305 is a deficient number, since it is larger than the sum of its proper divisors (4069006480667).

20345032403305 is an equidigital number, since it uses as much as digits as its factorization.

20345032403305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069006480666.

The product of its (nonzero) digits is 129600, while the sum is 34.

Adding to 20345032403305 its reverse (50330423054302), we get a palindrome (70675455457607).

The spelling of 20345032403305 in words is "twenty trillion, three hundred forty-five billion, thirty-two million, four hundred three thousand, three hundred five".