20020323021 has 16 divisors (see below), whose sum is σ = 27857633280. Its totient is φ = 12765083760.

The previous prime is 20020322947. The next prime is 20020323023. The reversal of 20020323021 is 12032302002.

It is not a de Polignac number, because 20020323021 - 2¹⁸ = 20020060877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020323023) 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, 1152720 + ... + 1169958.

It is an arithmetic number, because the mean of its divisors is an integer number (1741102080).

Almost surely, 2^20020323021 is an apocalyptic number.

It is an amenable number.

20020323021 is a deficient number, since it is larger than the sum of its proper divisors (7837310259).

20020323021 is a wasteful number, since it uses less digits than its factorization.

20020323021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34096.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20020323021 its reverse (12032302002), we get a palindrome (32052625023).

The spelling of 20020323021 in words is "twenty billion, twenty million, three hundred twenty-three thousand, twenty-one".