2001320323 has 4 divisors (see below), whose sum is σ = 2001533688. Its totient is φ = 2001106960.

The previous prime is 2001320317. The next prime is 2001320389. The reversal of 2001320323 is 3230231002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001320323 - 2¹⁷ = 2001189251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001320297 and 2001320306.

It is not an unprimeable number, because it can be changed into a prime (2001323323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91933 + ... + 111598.

It is an arithmetic number, because the mean of its divisors is an integer number (500383422).

Almost surely, 2^2001320323 is an apocalyptic number.

2001320323 is a deficient number, since it is larger than the sum of its proper divisors (213365).

2001320323 is an equidigital number, since it uses as much as digits as its factorization.

2001320323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213364.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 2001320323 is about 44736.1187744310. The cubic root of 2001320323 is about 1260.1982393639.

Adding to 2001320323 its reverse (3230231002), we get a palindrome (5231551325).

The spelling of 2001320323 in words is "two billion, one million, three hundred twenty thousand, three hundred twenty-three".