20032312021 has 2 divisors, whose sum is σ = 20032312022. Its totient is φ = 20032312020.

The previous prime is 20032312019. The next prime is 20032312033. The reversal of 20032312021 is 12021323002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19926427921 + 105884100 = 141161^2 + 10290^2 .

It is a cyclic number.

It is not a de Polignac number, because 20032312021 - 2¹ = 20032312019 is a prime.

It is a super-2 number, since 2×20032312021² (a number of 21 digits) contains 22 as substring.

Together with 20032312019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20032311986 and 20032312004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20032312621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10016156010 + 10016156011.

It is an arithmetic number, because the mean of its divisors is an integer number (10016156011).

Almost surely, 2^20032312021 is an apocalyptic number.

It is an amenable number.

20032312021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20032312021 is an equidigital number, since it uses as much as digits as its factorization.

20032312021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20032312021 its reverse (12021323002), we get a palindrome (32053635023).

The spelling of 20032312021 in words is "twenty billion, thirty-two million, three hundred twelve thousand, twenty-one".