203030013 has 4 divisors (see below), whose sum is σ = 270706688. Its totient is φ = 135353340.

The previous prime is 203029927. The next prime is 203030057. The reversal of 203030013 is 310030302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 203030013 - 2²¹ = 200932861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203032013) 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 in 3 ways as a sum of consecutive naturals, for example, 33838333 + ... + 33838338.

It is an arithmetic number, because the mean of its divisors is an integer number (67676672).

Almost surely, 2^203030013 is an apocalyptic number.

It is an amenable number.

203030013 is a deficient number, since it is larger than the sum of its proper divisors (67676675).

203030013 is an equidigital number, since it uses as much as digits as its factorization.

203030013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67676674.

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 203030013 is about 14248.8600596679. The cubic root of 203030013 is about 587.7420284219.

Adding to 203030013 its reverse (310030302), we get a palindrome (513060315).

The spelling of 203030013 in words is "two hundred three million, thirty thousand, thirteen".