20442421001 has 8 divisors (see below), whose sum is σ = 22391293320. Its totient is φ = 18576479488.

The previous prime is 20442420997. The next prime is 20442421031. The reversal of 20442421001 is 10012424402.

It can be written as a sum of positive squares in 4 ways, for example, as 5873689600 + 14568731401 = 76640^2 + 120701^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20442421001 - 2² = 20442420997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20442421031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20732186 + ... + 20733171.

It is an arithmetic number, because the mean of its divisors is an integer number (2798911665).

Almost surely, 2^20442421001 is an apocalyptic number.

It is an amenable number.

20442421001 is a deficient number, since it is larger than the sum of its proper divisors (1948872319).

20442421001 is a wasteful number, since it uses less digits than its factorization.

20442421001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41465403.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20442421001 its reverse (10012424402), we get a palindrome (30454845403).

The spelling of 20442421001 in words is "twenty billion, four hundred forty-two million, four hundred twenty-one thousand, one".