20321132030021 has 8 divisors (see below), whose sum is σ = 20395077736440. Its totient is φ = 20247190527168.

The previous prime is 20321132030011. The next prime is 20321132030063. The reversal of 20321132030021 is 12003023112302.

It can be written as a sum of positive squares in 4 ways, for example, as 682629573796 + 19638502456225 = 826214^2 + 4431535^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20321132030021 - 2¹⁰ = 20321132028997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20321132029975 and 20321132030002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321132030011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8802995 + ... + 10868991.

It is an arithmetic number, because the mean of its divisors is an integer number (2549384717055).

Almost surely, 2^{20321132030021} is an apocalyptic number.

It is an amenable number.

20321132030021 is a deficient number, since it is larger than the sum of its proper divisors (73945706419).

20321132030021 is a wasteful number, since it uses less digits than its factorization.

20321132030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101783.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20321132030021 its reverse (12003023112302), we get a palindrome (32324155142323).

The spelling of 20321132030021 in words is "twenty trillion, three hundred twenty-one billion, one hundred thirty-two million, thirty thousand, twenty-one".