20020122173 has 2 divisors, whose sum is σ = 20020122174. Its totient is φ = 20020122172.

The previous prime is 20020122169. The next prime is 20020122211. The reversal of 20020122173 is 37122102002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17108116804 + 2912005369 = 130798^2 + 53963^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020122173 - 2² = 20020122169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020122373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010061086 + 10010061087.

It is an arithmetic number, because the mean of its divisors is an integer number (10010061087).

Almost surely, 2^20020122173 is an apocalyptic number.

It is an amenable number.

20020122173 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020122173 is an equidigital number, since it uses as much as digits as its factorization.

20020122173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

Adding to 20020122173 its reverse (37122102002), we get a palindrome (57142224175).

The spelling of 20020122173 in words is "twenty billion, twenty million, one hundred twenty-two thousand, one hundred seventy-three".