20212004173 has 2 divisors, whose sum is σ = 20212004174. Its totient is φ = 20212004172.

The previous prime is 20212004063. The next prime is 20212004177. The reversal of 20212004173 is 37140021202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12647701444 + 7564302729 = 112462^2 + 86973^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212004173 - 2²¹ = 20209907021 is a prime.

It is a super-3 number, since 3×20212004173³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212004177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106002086 + 10106002087.

It is an arithmetic number, because the mean of its divisors is an integer number (10106002087).

Almost surely, 2^20212004173 is an apocalyptic number.

It is an amenable number.

20212004173 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212004173 is an equidigital number, since it uses as much as digits as its factorization.

20212004173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 20212004173 its reverse (37140021202), we get a palindrome (57352025375).

The spelling of 20212004173 in words is "twenty billion, two hundred twelve million, four thousand, one hundred seventy-three".