20424111125423 has 4 divisors (see below), whose sum is σ = 20425042521840. Its totient is φ = 20423179729008.

The previous prime is 20424111125417. The next prime is 20424111125447. The reversal of 20424111125423 is 32452111142402.

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 20424111125423 - 2²⁰ = 20424110076847 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 20424111125423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424111125323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465665315 + ... + 465709172.

It is an arithmetic number, because the mean of its divisors is an integer number (5106260630460).

Almost surely, 2^{20424111125423} is an apocalyptic number.

20424111125423 is a deficient number, since it is larger than the sum of its proper divisors (931396417).

20424111125423 is an equidigital number, since it uses as much as digits as its factorization.

20424111125423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931396416.

The product of its (nonzero) digits is 15360, while the sum is 32.

Adding to 20424111125423 its reverse (32452111142402), we get a palindrome (52876222267825).

The spelling of 20424111125423 in words is "twenty trillion, four hundred twenty-four billion, one hundred eleven million, one hundred twenty-five thousand, four hundred twenty-three".