200020009 has 6 divisors (see below), whose sum is σ = 232676394. Its totient is φ = 171445680.

The previous prime is 200019997. The next prime is 200020031. The reversal of 200020009 is 900020002.

It can be written as a sum of positive squares in only one way, i.e., 180633600 + 19386409 = 13440^2 + 4403^2 .

It is not a de Polignac number, because 200020009 - 2¹⁵ = 199987241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200020069) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2040972 + ... + 2041069.

It is an arithmetic number, because the mean of its divisors is an integer number (38779399).

Almost surely, 2^200020009 is an apocalyptic number.

It is an amenable number.

200020009 is a deficient number, since it is larger than the sum of its proper divisors (32656385).

200020009 is an equidigital number, since it uses as much as digits as its factorization.

200020009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4082055 (or 4082048 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 200020009 is about 14142.8430310175. The cubic root of 200020009 is about 584.8230492159.

The spelling of 200020009 in words is "two hundred million, twenty thousand, nine".