20024040523 has 4 divisors (see below), whose sum is σ = 20489715928. Its totient is φ = 19558365120.

The previous prime is 20024040497. The next prime is 20024040577. The reversal of 20024040523 is 32504042002.

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 20024040523 - 2²⁵ = 19990486091 is a prime.

It is a super-2 number, since 2×20024040523² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20024040494 and 20024040503.

It is not an unprimeable number, because it can be changed into a prime (20024040623) 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, 232837638 + ... + 232837723.

It is an arithmetic number, because the mean of its divisors is an integer number (5122428982).

Almost surely, 2^20024040523 is an apocalyptic number.

20024040523 is a deficient number, since it is larger than the sum of its proper divisors (465675405).

20024040523 is an equidigital number, since it uses as much as digits as its factorization.

20024040523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465675404.

The product of its (nonzero) digits is 1920, while the sum is 22.

Adding to 20024040523 its reverse (32504042002), we get a palindrome (52528082525).

The spelling of 20024040523 in words is "twenty billion, twenty-four million, forty thousand, five hundred twenty-three".