2001323023 has 16 divisors (see below), whose sum is σ = 2352332800. Its totient is φ = 1701875448.

The previous prime is 2001322997. The next prime is 2001323039. The reversal of 2001323023 is 3203231002.

It is not a de Polignac number, because 2001323023 - 2¹³ = 2001314831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001322988 and 2001323006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001323053) 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, 20590 + ... + 66532.

It is an arithmetic number, because the mean of its divisors is an integer number (147020800).

Almost surely, 2^2001323023 is an apocalyptic number.

2001323023 is a deficient number, since it is larger than the sum of its proper divisors (351009777).

2001323023 is an equidigital number, since it uses as much as digits as its factorization.

2001323023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46091 (or 46077 counting only the distinct ones).

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

The square root of 2001323023 is about 44736.1489513794. The cubic root of 2001323023 is about 1260.1988060788.

Adding to 2001323023 its reverse (3203231002), we get a palindrome (5204554025).

The spelling of 2001323023 in words is "two billion, one million, three hundred twenty-three thousand, twenty-three".