20021022001973 has 2 divisors, whose sum is σ = 20021022001974. Its totient is φ = 20021022001972.

The previous prime is 20021022001961. The next prime is 20021022002027. The reversal of 20021022001973 is 37910022012002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20002379649604 + 18642352369 = 4472402^2 + 136537^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021022001973 - 2²⁶ = 20020954893109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021022601973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010511000986 + 10010511000987.

It is an arithmetic number, because the mean of its divisors is an integer number (10010511000987).

Almost surely, 2^{20021022001973} is an apocalyptic number.

It is an amenable number.

20021022001973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021022001973 is an equidigital number, since it uses as much as digits as its factorization.

20021022001973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

Adding to 20021022001973 its reverse (37910022012002), we get a palindrome (57931044013975).

The spelling of 20021022001973 in words is "twenty trillion, twenty-one billion, twenty-two million, one thousand, nine hundred seventy-three".