20346305543209 has 4 divisors (see below), whose sum is σ = 20411727747840. Its totient is φ = 20280883338580.

The previous prime is 20346305543189. The next prime is 20346305543237. The reversal of 20346305543209 is 90234550364302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20346305543209 - 2⁹ = 20346305542697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20346305543269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32711101849 + ... + 32711102470.

It is an arithmetic number, because the mean of its divisors is an integer number (5102931936960).

Almost surely, 2^{20346305543209} is an apocalyptic number.

It is an amenable number.

20346305543209 is a deficient number, since it is larger than the sum of its proper divisors (65422204631).

20346305543209 is an equidigital number, since it uses as much as digits as its factorization.

20346305543209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65422204630.

The product of its (nonzero) digits is 2332800, while the sum is 46.

The spelling of 20346305543209 in words is "twenty trillion, three hundred forty-six billion, three hundred five million, five hundred forty-three thousand, two hundred nine".