20305300240013 has 4 divisors (see below), whose sum is σ = 21005483006940. Its totient is φ = 19605117473088.

The previous prime is 20305300240003. The next prime is 20305300240019. The reversal of 20305300240013 is 31004200350302.

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 6472353222724 + 13832947017289 = 2544082^2 + 3719267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20305300240013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20305300240019) 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, 350091383420 + ... + 350091383477.

It is an arithmetic number, because the mean of its divisors is an integer number (5251370751735).

Almost surely, 2^{20305300240013} is an apocalyptic number.

It is an amenable number.

20305300240013 is a deficient number, since it is larger than the sum of its proper divisors (700182766927).

20305300240013 is an equidigital number, since it uses as much as digits as its factorization.

20305300240013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700182766926.

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 20305300240013 its reverse (31004200350302), we get a palindrome (51309500590315).

The spelling of 20305300240013 in words is "twenty trillion, three hundred five billion, three hundred million, two hundred forty thousand, thirteen".