2010020009 has 2 divisors, whose sum is σ = 2010020010. Its totient is φ = 2010020008.

The previous prime is 2010020003. The next prime is 2010020021. The reversal of 2010020009 is 9000200102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1633776400 + 376243609 = 40420^2 + 19397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2010020009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2010019975 and 2010020002.

It is not a weakly prime, because it can be changed into another prime (2010020003) 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, 1005010004 + 1005010005.

It is an arithmetic number, because the mean of its divisors is an integer number (1005010005).

Almost surely, 2^2010020009 is an apocalyptic number.

It is an amenable number.

2010020009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2010020009 is an equidigital number, since it uses as much as digits as its factorization.

2010020009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2010020009 is about 44833.2466926053. The cubic root of 2010020009 is about 1262.0216158855.

The spelling of 2010020009 in words is "two billion, ten million, twenty thousand, nine".