20440040321001 has 64 divisors (see below), whose sum is σ = 32044492947456. Its totient is φ = 11346341932800.

The previous prime is 20440040320991. The next prime is 20440040321009. The reversal of 20440040321001 is 10012304004402.

It is not a de Polignac number, because 20440040321001 - 2¹⁵ = 20440040288233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20440040321009) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1169530675 + ... + 1169548151.

It is an arithmetic number, because the mean of its divisors is an integer number (500695202304).

Almost surely, 2^{20440040321001} is an apocalyptic number.

20440040321001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20440040321001 is a deficient number, since it is larger than the sum of its proper divisors (11604452626455).

20440040321001 is a wasteful number, since it uses less digits than its factorization.

20440040321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24502.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20440040321001 its reverse (10012304004402), we get a palindrome (30452344325403).

The spelling of 20440040321001 in words is "twenty trillion, four hundred forty billion, forty million, three hundred twenty-one thousand, one".