20420424004224 has 64 divisors (see below), whose sum is σ = 54242292637440. Its totient is φ = 6806740064256.

The previous prime is 20420424004207. The next prime is 20420424004283. The reversal of 20420424004224 is 42240042402402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 20420424004191 and 20420424004200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51275692 + ... + 51672404.

It is an arithmetic number, because the mean of its divisors is an integer number (847535822460).

Almost surely, 2^{20420424004224} is an apocalyptic number.

20420424004224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20420424004224 is an abundant number, since it is smaller than the sum of its proper divisors (33821868633216).

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

20420424004224 is a wasteful number, since it uses less digits than its factorization.

20420424004224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530777 (or 530765 counting only the distinct ones).

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

Adding to 20420424004224 its reverse (42240042402402), we get a palindrome (62660466406626).

The spelling of 20420424004224 in words is "twenty trillion, four hundred twenty billion, four hundred twenty-four million, four thousand, two hundred twenty-four".