203020413209 has 2 divisors, whose sum is σ = 203020413210. Its totient is φ = 203020413208.

The previous prime is 203020413203. The next prime is 203020413221. The reversal of 203020413209 is 902314020302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192191929609 + 10828483600 = 438397^2 + 104060^2 .

It is a cyclic number.

It is not a de Polignac number, because 203020413209 - 2¹² = 203020409113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (203020413203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101510206604 + 101510206605.

It is an arithmetic number, because the mean of its divisors is an integer number (101510206605).

Almost surely, 2^203020413209 is an apocalyptic number.

It is an amenable number.

203020413209 is a deficient number, since it is larger than the sum of its proper divisors (1).

203020413209 is an equidigital number, since it uses as much as digits as its factorization.

203020413209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 203020413209 in words is "two hundred three billion, twenty million, four hundred thirteen thousand, two hundred nine".