20424221001 has 24 divisors (see below), whose sum is σ = 30306811080. Its totient is φ = 13244726016.

The previous prime is 20424220967. The next prime is 20424221011. The reversal of 20424221001 is 10012242402.

20424221001 is a `hidden beast` number, since 20 + 424 + 221 + 0 + 0 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9753537600 + 10670683401 = 98760^2 + 103299^2 .

It is not a de Polignac number, because 20424221001 - 2⁹ = 20424220489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20424221011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2257555 + ... + 2266583.

It is an arithmetic number, because the mean of its divisors is an integer number (1262783795).

Almost surely, 2^20424221001 is an apocalyptic number.

It is an amenable number.

20424221001 is a deficient number, since it is larger than the sum of its proper divisors (9882590079).

20424221001 is a wasteful number, since it uses less digits than its factorization.

20424221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15865 (or 15862 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20424221001 its reverse (10012242402), we get a palindrome (30436463403).

The spelling of 20424221001 in words is "twenty billion, four hundred twenty-four million, two hundred twenty-one thousand, one".