20440442111005 has 32 divisors (see below), whose sum is σ = 28938507614208. Its totient is φ = 13563403257600.

The previous prime is 20440442110997. The next prime is 20440442111051. The reversal of 20440442111005 is 50011124404402.

It is a happy number.

It is not a de Polignac number, because 20440442111005 - 2³ = 20440442110997 is a prime.

It is a super-2 number, since 2×20440442111005² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19154835 + ... + 20193775.

It is an arithmetic number, because the mean of its divisors is an integer number (904328362944).

Almost surely, 2^{20440442111005} is an apocalyptic number.

It is an amenable number.

20440442111005 is a deficient number, since it is larger than the sum of its proper divisors (8498065503203).

20440442111005 is a wasteful number, since it uses less digits than its factorization.

20440442111005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057117.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 20440442111005 its reverse (50011124404402), we get a palindrome (70451566515407).

The spelling of 20440442111005 in words is "twenty trillion, four hundred forty billion, four hundred forty-two million, one hundred eleven thousand, five".