20440001 has 8 divisors (see below), whose sum is σ = 21684960. Its totient is φ = 19199808.

The previous prime is 20439959. The next prime is 20440039. The reversal of 20440001 is 10004402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20440001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20440201) 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, 11750 + ... + 13376.

It is an arithmetic number, because the mean of its divisors is an integer number (2710620).

Almost surely, 2^20440001 is an apocalyptic number.

It is an amenable number.

20440001 is a deficient number, since it is larger than the sum of its proper divisors (1244959).

20440001 is a wasteful number, since it uses less digits than its factorization.

20440001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20440001 is about 4521.0619327764. The cubic root of 20440001 is about 273.4179173415.

Adding to 20440001 its reverse (10004402), we get a palindrome (30444403).

The spelling of 20440001 in words is "twenty million, four hundred forty thousand, one".