320021313323 has 4 divisors (see below), whose sum is σ = 336864540360. Its totient is φ = 303178086288.

The previous prime is 320021313317. The next prime is 320021313341. The reversal of 320021313323 is 323313120023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323313120023 = 2659 ⋅121591997.

It is a cyclic number.

It is not a de Polignac number, because 320021313323 - 2⁸ = 320021313067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320021313823) 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, 8421613490 + ... + 8421613527.

It is an arithmetic number, because the mean of its divisors is an integer number (84216135090).

Almost surely, 2^320021313323 is an apocalyptic number.

320021313323 is a deficient number, since it is larger than the sum of its proper divisors (16843227037).

320021313323 is a wasteful number, since it uses less digits than its factorization.

320021313323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16843227036.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 320021313323 its reverse (323313120023), we get a palindrome (643334433346).

The spelling of 320021313323 in words is "three hundred twenty billion, twenty-one million, three hundred thirteen thousand, three hundred twenty-three".