20321322023 has 4 divisors (see below), whose sum is σ = 20507756280. Its totient is φ = 20134887768.

The previous prime is 20321322017. The next prime is 20321322031. The reversal of 20321322023 is 32022312302.

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 20321322023 - 2¹⁴ = 20321305639 is a prime.

It is a super-2 number, since 2×20321322023² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20321321986 and 20321322004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321322223) 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, 93216965 + ... + 93217182.

It is an arithmetic number, because the mean of its divisors is an integer number (5126939070).

Almost surely, 2^20321322023 is an apocalyptic number.

20321322023 is a deficient number, since it is larger than the sum of its proper divisors (186434257).

20321322023 is a wasteful number, since it uses less digits than its factorization.

20321322023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186434256.

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

Adding to 20321322023 its reverse (32022312302), we get a palindrome (52343634325).

The spelling of 20321322023 in words is "twenty billion, three hundred twenty-one million, three hundred twenty-two thousand, twenty-three".