20424123023 has 4 divisors (see below), whose sum is σ = 20858678880. Its totient is φ = 19989567168.

The previous prime is 20424123007. The next prime is 20424123053. The reversal of 20424123023 is 32032142402.

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 20424123023 - 2⁴ = 20424123007 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 20424123023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424123053) 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, 217277858 + ... + 217277951.

It is an arithmetic number, because the mean of its divisors is an integer number (5214669720).

Almost surely, 2^20424123023 is an apocalyptic number.

20424123023 is a deficient number, since it is larger than the sum of its proper divisors (434555857).

20424123023 is an equidigital number, since it uses as much as digits as its factorization.

20424123023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434555856.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20424123023 its reverse (32032142402), we get a palindrome (52456265425).

The spelling of 20424123023 in words is "twenty billion, four hundred twenty-four million, one hundred twenty-three thousand, twenty-three".