20323144430203 has 16 divisors (see below), whose sum is σ = 21399410905600. Its totient is φ = 19247541861600.

The previous prime is 20323144430189. The next prime is 20323144430207. The reversal of 20323144430203 is 30203444132302.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20323144430203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20323144430207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1217456725 + ... + 1217473417.

It is an arithmetic number, because the mean of its divisors is an integer number (1337463181600).

Almost surely, 2^{20323144430203} is an apocalyptic number.

20323144430203 is a deficient number, since it is larger than the sum of its proper divisors (1076266475397).

20323144430203 is a wasteful number, since it uses less digits than its factorization.

20323144430203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32722.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 20323144430203 its reverse (30203444132302), we get a palindrome (50526588562505).

The spelling of 20323144430203 in words is "twenty trillion, three hundred twenty-three billion, one hundred forty-four million, four hundred thirty thousand, two hundred three".