20423430311 has 8 divisors (see below), whose sum is σ = 20991736560. Its totient is φ = 19855983168.

The previous prime is 20423430289. The next prime is 20423430317. The reversal of 20423430311 is 11303432402.

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

It is a cyclic number.

It is not a de Polignac number, because 20423430311 - 2¹⁰ = 20423429287 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 (20423430317) 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, 166421 + ... + 261806.

It is an arithmetic number, because the mean of its divisors is an integer number (2623967070).

Almost surely, 2^20423430311 is an apocalyptic number.

20423430311 is a deficient number, since it is larger than the sum of its proper divisors (568306249).

20423430311 is a wasteful number, since it uses less digits than its factorization.

20423430311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429553.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20423430311 its reverse (11303432402), we get a palindrome (31726862713).

The spelling of 20423430311 in words is "twenty billion, four hundred twenty-three million, four hundred thirty thousand, three hundred eleven".