20001001323 has 4 divisors (see below), whose sum is σ = 26668001768. Its totient is φ = 13334000880.

The previous prime is 20001001291. The next prime is 20001001351. The reversal of 20001001323 is 32310010002.

It is a happy number.

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

It is not a de Polignac number, because 20001001323 - 2⁵ = 20001001291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001001299 and 20001001308.

It is not an unprimeable number, because it can be changed into a prime (20001001523) 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, 3333500218 + ... + 3333500223.

It is an arithmetic number, because the mean of its divisors is an integer number (6667000442).

Almost surely, 2^20001001323 is an apocalyptic number.

20001001323 is a deficient number, since it is larger than the sum of its proper divisors (6667000445).

20001001323 is an equidigital number, since it uses as much as digits as its factorization.

20001001323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667000444.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20001001323 its reverse (32310010002), we get a palindrome (52311011325).

The spelling of 20001001323 in words is "twenty billion, one million, one thousand, three hundred twenty-three".