20404004224 has 32 divisors (see below), whose sum is σ = 40661934840. Its totient is φ = 10198656000.

The previous prime is 20404004219. The next prime is 20404004227. The reversal of 20404004224 is 42240040402.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 20404004195 and 20404004204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404004227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391612 + ... + 440644.

Almost surely, 2^20404004224 is an apocalyptic number.

It is an amenable number.

20404004224 is a deficient number, since it is larger than the sum of its proper divisors (20257930616).

20404004224 is an equidigital number, since it uses as much as digits as its factorization.

20404004224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52298 (or 52286 counting only the distinct ones).

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

Adding to 20404004224 its reverse (42240040402), we get a palindrome (62644044626).

The spelling of 20404004224 in words is "twenty billion, four hundred four million, four thousand, two hundred twenty-four".