20404424424 has 64 divisors (see below), whose sum is σ = 53745868800. Its totient is φ = 6442577856.

The previous prime is 20404424419. The next prime is 20404424431. The reversal of 20404424424 is 42442440402.

It is a junction number, because it is equal to n+sod(n) for n = 20404424391 and 20404424400.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122584 + ... + 236295.

It is an arithmetic number, because the mean of its divisors is an integer number (839779200).

Almost surely, 2^20404424424 is an apocalyptic number.

20404424424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20404424424 is an abundant number, since it is smaller than the sum of its proper divisors (33341444376).

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

20404424424 is a wasteful number, since it uses less digits than its factorization.

20404424424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359014 (or 359010 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 20404424424 its reverse (42442440402), we get a palindrome (62846864826).

The spelling of 20404424424 in words is "twenty billion, four hundred four million, four hundred twenty-four thousand, four hundred twenty-four".