20431021124224 has 32 divisors (see below), whose sum is σ = 41470395190740. Its totient is φ = 10022765076480.

The previous prime is 20431021124093. The next prime is 20431021124237. The reversal of 20431021124224 is 42242112013402.

It can be written as a sum of positive squares in 2 ways, for example, as 17320312885824 + 3110708238400 = 4161768^2 + 1763720^2 .

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 = 20431021124192 and 20431021124201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1505817297 + ... + 1505830864.

Almost surely, 2^{20431021124224} is an apocalyptic number.

It is an amenable number.

20431021124224 is an abundant number, since it is smaller than the sum of its proper divisors (21039374066516).

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

20431021124224 is an equidigital number, since it uses as much as digits as its factorization.

20431021124224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011648228 (or 3011648216 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 20431021124224 its reverse (42242112013402), we get a palindrome (62673133137626).

The spelling of 20431021124224 in words is "twenty trillion, four hundred thirty-one billion, twenty-one million, one hundred twenty-four thousand, two hundred twenty-four".