20320012423 has 4 divisors (see below), whose sum is σ = 21203491248. Its totient is φ = 19436533600.

The previous prime is 20320012411. The next prime is 20320012429. The reversal of 20320012423 is 32421002302.

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

It is a cyclic number.

It is not a de Polignac number, because 20320012423 - 2²⁵ = 20286457991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20320012423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320012429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441739378 + ... + 441739423.

It is an arithmetic number, because the mean of its divisors is an integer number (5300872812).

Almost surely, 2^20320012423 is an apocalyptic number.

20320012423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20320012423 is a deficient number, since it is larger than the sum of its proper divisors (883478825).

20320012423 is an equidigital number, since it uses as much as digits as its factorization.

20320012423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883478824.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20320012423 its reverse (32421002302), we get a palindrome (52741014725).

The spelling of 20320012423 in words is "twenty billion, three hundred twenty million, twelve thousand, four hundred twenty-three".