20424404020 has 24 divisors (see below), whose sum is σ = 43888721184. Its totient is φ = 7979766816.

The previous prime is 20424403969. The next prime is 20424404029. The reversal of 20424404020 is 2040442402.

It is a junction number, because it is equal to n+sod(n) for n = 20424403982 and 20424404000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424404029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11873794 + ... + 11875513.

It is an arithmetic number, because the mean of its divisors is an integer number (1828696716).

Almost surely, 2^20424404020 is an apocalyptic number.

20424404020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20424404020 is an abundant number, since it is smaller than the sum of its proper divisors (23464317164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20424404020 is a wasteful number, since it uses less digits than its factorization.

20424404020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23749359 (or 23749357 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20424404020 its reverse (2040442402), we get a palindrome (22464846422).

The spelling of 20424404020 in words is "twenty billion, four hundred twenty-four million, four hundred four thousand, twenty".