203423822321 has 4 divisors (see below), whose sum is σ = 205224033252. Its totient is φ = 201623611392.

The previous prime is 203423822309. The next prime is 203423822323. The reversal of 203423822321 is 123228324302.

203423822321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38794817296 + 164629005025 = 196964^2 + 405745^2 .

It is a cyclic number.

It is not a de Polignac number, because 203423822321 - 2¹⁸ = 203423560177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203423822323) 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, 900105296 + ... + 900105521.

It is an arithmetic number, because the mean of its divisors is an integer number (51306008313).

Almost surely, 2^203423822321 is an apocalyptic number.

It is an amenable number.

203423822321 is a deficient number, since it is larger than the sum of its proper divisors (1800210931).

203423822321 is a wasteful number, since it uses less digits than its factorization.

203423822321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800210930.

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 203423822321 in words is "two hundred three billion, four hundred twenty-three million, eight hundred twenty-two thousand, three hundred twenty-one".