203943393813 has 8 divisors (see below), whose sum is σ = 275366608000. Its totient is φ = 134241221088.

The previous prime is 203943393811. The next prime is 203943393943. The reversal of 203943393813 is 318393349302.

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

It is not a de Polignac number, because 203943393813 - 2¹ = 203943393811 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 (203943393811) 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, 430260088 + ... + 430260561.

It is an arithmetic number, because the mean of its divisors is an integer number (34420826000).

Almost surely, 2^203943393813 is an apocalyptic number.

It is an amenable number.

203943393813 is a deficient number, since it is larger than the sum of its proper divisors (71423214187).

203943393813 is an equidigital number, since it uses as much as digits as its factorization.

203943393813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860520731.

The product of its (nonzero) digits is 1259712, while the sum is 48.

The spelling of 203943393813 in words is "two hundred three billion, nine hundred forty-three million, three hundred ninety-three thousand, eight hundred thirteen".