20442112001 has 4 divisors (see below), whose sum is σ = 20451495600. Its totient is φ = 20432728404.

The previous prime is 20442111947. The next prime is 20442112013. The reversal of 20442112001 is 10021124402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20442112001 - 2¹⁰ = 20442110977 is a prime.

It is a super-2 number, since 2×20442112001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20442112501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4688531 + ... + 4692888.

It is an arithmetic number, because the mean of its divisors is an integer number (5112873900).

Almost surely, 2^20442112001 is an apocalyptic number.

It is an amenable number.

20442112001 is a deficient number, since it is larger than the sum of its proper divisors (9383599).

20442112001 is an equidigital number, since it uses as much as digits as its factorization.

20442112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9383598.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20442112001 its reverse (10021124402), we get a palindrome (30463236403).

The spelling of 20442112001 in words is "twenty billion, four hundred forty-two million, one hundred twelve thousand, one".