20440420005 has 16 divisors (see below), whose sum is σ = 32771839104. Its totient is φ = 10879168320.

The previous prime is 20440419973. The next prime is 20440420009. The reversal of 20440420005 is 50002404402.

It is not a de Polignac number, because 20440420005 - 2⁵ = 20440419973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440420009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1391766 + ... + 1406375.

It is an arithmetic number, because the mean of its divisors is an integer number (2048239944).

Almost surely, 2^20440420005 is an apocalyptic number.

It is an amenable number.

20440420005 is a deficient number, since it is larger than the sum of its proper divisors (12331419099).

20440420005 is a wasteful number, since it uses less digits than its factorization.

20440420005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798636.

The product of its (nonzero) digits is 1280, while the sum is 21.

Adding to 20440420005 its reverse (50002404402), we get a palindrome (70442824407).

The spelling of 20440420005 in words is "twenty billion, four hundred forty million, four hundred twenty thousand, five".