20020209973 has 2 divisors, whose sum is σ = 20020209974. Its totient is φ = 20020209972.

The previous prime is 20020209971. The next prime is 20020210127. The reversal of 20020209973 is 37990202002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17885585169 + 2134624804 = 133737^2 + 46202^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020209973 - 2¹ = 20020209971 is a prime.

Together with 20020209971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020209971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010104986 + 10010104987.

It is an arithmetic number, because the mean of its divisors is an integer number (10010104987).

Almost surely, 2^20020209973 is an apocalyptic number.

It is an amenable number.

20020209973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020209973 is an equidigital number, since it uses as much as digits as its factorization.

20020209973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 20020209973 in words is "twenty billion, twenty million, two hundred nine thousand, nine hundred seventy-three".