20424004023 has 4 divisors (see below), whose sum is σ = 27232005368. Its totient is φ = 13616002680.

The previous prime is 20424003997. The next prime is 20424004043. The reversal of 20424004023 is 32040042402.

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

It is not a de Polignac number, because 20424004023 - 2¹² = 20423999927 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 (20424004043) 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, 3404000668 + ... + 3404000673.

It is an arithmetic number, because the mean of its divisors is an integer number (6808001342).

Almost surely, 2^20424004023 is an apocalyptic number.

20424004023 is a deficient number, since it is larger than the sum of its proper divisors (6808001345).

20424004023 is an equidigital number, since it uses as much as digits as its factorization.

20424004023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6808001344.

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20424004023 its reverse (32040042402), we get a palindrome (52464046425).

The spelling of 20424004023 in words is "twenty billion, four hundred twenty-four million, four thousand, twenty-three".