20323012021 has 24 divisors (see below), whose sum is σ = 22471668000. Its totient is φ = 18364821696.

The previous prime is 20323012019. The next prime is 20323012027. The reversal of 20323012021 is 12021032302.

It is not a de Polignac number, because 20323012021 - 2¹ = 20323012019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20323011986 and 20323012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323012027) 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 23 ways as a sum of consecutive naturals, for example, 4467270 + ... + 4471816.

It is an arithmetic number, because the mean of its divisors is an integer number (936319500).

Almost surely, 2^20323012021 is an apocalyptic number.

It is an amenable number.

20323012021 is a deficient number, since it is larger than the sum of its proper divisors (2148655979).

20323012021 is a wasteful number, since it uses less digits than its factorization.

20323012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5125 (or 5112 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20323012021 its reverse (12021032302), we get a palindrome (32344044323).

The spelling of 20323012021 in words is "twenty billion, three hundred twenty-three million, twelve thousand, twenty-one".