20305311323 has 8 divisors (see below), whose sum is σ = 22152290160. Its totient is φ = 18458506080.

The previous prime is 20305311317. The next prime is 20305311353. The reversal of 20305311323 is 32311350302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20305311323 - 2¹⁰ = 20305310299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20305311353) 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 7 ways as a sum of consecutive naturals, for example, 385661 + ... + 435137.

It is an arithmetic number, because the mean of its divisors is an integer number (2769036270).

Almost surely, 2^20305311323 is an apocalyptic number.

20305311323 is a deficient number, since it is larger than the sum of its proper divisors (1846978837).

20305311323 is a wasteful number, since it uses less digits than its factorization.

20305311323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86797.

The product of its (nonzero) digits is 1620, while the sum is 23.

Adding to 20305311323 its reverse (32311350302), we get a palindrome (52616661625).

The spelling of 20305311323 in words is "twenty billion, three hundred five million, three hundred eleven thousand, three hundred twenty-three".