20320211221323 has 16 divisors (see below), whose sum is σ = 29656062786336. Its totient is φ = 12299749539840.

The previous prime is 20320211221279. The next prime is 20320211221379. The reversal of 20320211221323 is 32312211202302.

It is not a de Polignac number, because 20320211221323 - 2⁹ = 20320211220811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20320211221293 and 20320211221302.

It is not an unprimeable number, because it can be changed into a prime (20320211271323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4270743990 + ... + 4270748747.

It is an arithmetic number, because the mean of its divisors is an integer number (1853503924146).

Almost surely, 2^{20320211221323} is an apocalyptic number.

20320211221323 is a deficient number, since it is larger than the sum of its proper divisors (9335851565013).

20320211221323 is a wasteful number, since it uses less digits than its factorization.

20320211221323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8541492814.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20320211221323 its reverse (32312211202302), we get a palindrome (52632422423625).

The spelling of 20320211221323 in words is "twenty trillion, three hundred twenty billion, two hundred eleven million, two hundred twenty-one thousand, three hundred twenty-three".