203324013 has 20 divisors (see below), whose sum is σ = 304845948. Its totient is φ = 135051840.

The previous prime is 203323999. The next prime is 203324027. The reversal of 203324013 is 310423302.

It is an interprime number because it is at equal distance from previous prime (203323999) and next prime (203324027).

It can be written as a sum of positive squares in 2 ways, for example, as 93954249 + 109369764 = 9693^2 + 10458^2 .

It is not a de Polignac number, because 203324013 - 2¹⁰ = 203322989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203324083) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18295 + ... + 27227.

Almost surely, 2^203324013 is an apocalyptic number.

It is an amenable number.

203324013 is a deficient number, since it is larger than the sum of its proper divisors (101521935).

203324013 is an equidigital number, since it uses as much as digits as its factorization.

203324013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9226 (or 9217 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 203324013 is about 14259.1729423554. The cubic root of 203324013 is about 588.0255871831.

Adding to 203324013 its reverse (310423302), we get a palindrome (513747315).

The spelling of 203324013 in words is "two hundred three million, three hundred twenty-four thousand, thirteen".