203420205 has 12 divisors (see below), whose sum is σ = 352595100. Its totient is φ = 108490752.

The previous prime is 203420167. The next prime is 203420207. The reversal of 203420205 is 502024302.

It can be written as a sum of positive squares in 2 ways, for example, as 68906601 + 134513604 = 8301^2 + 11598^2 .

It is not a de Polignac number, because 203420205 - 2⁹ = 203419693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203420207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2260180 + ... + 2260269.

It is an arithmetic number, because the mean of its divisors is an integer number (29382925).

Almost surely, 2^203420205 is an apocalyptic number.

It is an amenable number.

203420205 is a deficient number, since it is larger than the sum of its proper divisors (149174895).

203420205 is a wasteful number, since it uses less digits than its factorization.

203420205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520460 (or 4520457 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 203420205 is about 14262.5455301640. The cubic root of 203420205 is about 588.1183036291.

Adding to 203420205 its reverse (502024302), we get a palindrome (705444507).

The spelling of 203420205 in words is "two hundred three million, four hundred twenty thousand, two hundred five".