203943393812 has 12 divisors (see below), whose sum is σ = 356904554580. Its totient is φ = 101970663936.

The previous prime is 203943393811. The next prime is 203943393943. The reversal of 203943393812 is 218393349302.

It can be written as a sum of positive squares in 2 ways, for example, as 173777261956 + 30166131856 = 416866^2 + 173684^2 .

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339938 + ... + 723494.

It is an arithmetic number, because the mean of its divisors is an integer number (29742046215).

Almost surely, 2^203943393812 is an apocalyptic number.

It is an amenable number.

203943393812 is a deficient number, since it is larger than the sum of its proper divisors (152961160768).

203943393812 is a wasteful number, since it uses less digits than its factorization.

203943393812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516490 (or 516488 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 47.

The spelling of 203943393812 in words is "two hundred three billion, nine hundred forty-three million, three hundred ninety-three thousand, eight hundred twelve".