20323021223 has 4 divisors (see below), whose sum is σ = 20601418848. Its totient is φ = 20044623600.

The previous prime is 20323021219. The next prime is 20323021241. The reversal of 20323021223 is 32212032302.

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 20323021223 - 2² = 20323021219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20323021195 and 20323021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323021253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139198703 + ... + 139198848.

It is an arithmetic number, because the mean of its divisors is an integer number (5150354712).

Almost surely, 2^20323021223 is an apocalyptic number.

20323021223 is a deficient number, since it is larger than the sum of its proper divisors (278397625).

20323021223 is an equidigital number, since it uses as much as digits as its factorization.

20323021223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278397624.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20323021223 its reverse (32212032302), we get a palindrome (52535053525).

The spelling of 20323021223 in words is "twenty billion, three hundred twenty-three million, twenty-one thousand, two hundred twenty-three".