203243021013 has 8 divisors (see below), whose sum is σ = 271031961376. Its totient is φ = 135474714000.

The previous prime is 203243021011. The next prime is 203243021027. The reversal of 203243021013 is 310120342302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 203243021013 - 2¹ = 203243021011 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 (203243021011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5135338 + ... + 5174763.

It is an arithmetic number, because the mean of its divisors is an integer number (33878995172).

Almost surely, 2^203243021013 is an apocalyptic number.

It is an amenable number.

203243021013 is a deficient number, since it is larger than the sum of its proper divisors (67788940363).

203243021013 is a wasteful number, since it uses less digits than its factorization.

203243021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10316675.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 203243021013 its reverse (310120342302), we get a palindrome (513363363315).

The spelling of 203243021013 in words is "two hundred three billion, two hundred forty-three million, twenty-one thousand, thirteen".