20002009997 has 2 divisors, whose sum is σ = 20002009998. Its totient is φ = 20002009996.

The previous prime is 20002009981. The next prime is 20002010029. The reversal of 20002009997 is 79990020002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15488051401 + 4513958596 = 124451^2 + 67186^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002009997 - 2⁴ = 20002009981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20002009997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002002997) 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, 10001004998 + 10001004999.

It is an arithmetic number, because the mean of its divisors is an integer number (10001004999).

Almost surely, 2^20002009997 is an apocalyptic number.

It is an amenable number.

20002009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002009997 is an equidigital number, since it uses as much as digits as its factorization.

20002009997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 38.

Adding to 20002009997 its reverse (79990020002), we get a palindrome (99992029999).

The spelling of 20002009997 in words is "twenty billion, two million, nine thousand, nine hundred ninety-seven".