20045500131005 has 8 divisors (see below), whose sum is σ = 24106779336024. Its totient is φ = 16001613985600.

The previous prime is 20045500131001. The next prime is 20045500131037. The reversal of 20045500131005 is 50013100554002.

It can be written as a sum of positive squares in 4 ways, for example, as 484101459076 + 19561398671929 = 695774^2 + 4422827^2 .

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

It is not a de Polignac number, because 20045500131005 - 2² = 20045500131001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045500131001) 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, 4348262366 + ... + 4348266975.

It is an arithmetic number, because the mean of its divisors is an integer number (3013347417003).

Almost surely, 2^{20045500131005} is an apocalyptic number.

It is an amenable number.

20045500131005 is a deficient number, since it is larger than the sum of its proper divisors (4061279205019).

20045500131005 is an equidigital number, since it uses as much as digits as its factorization.

20045500131005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8696529807.

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 20045500131005 its reverse (50013100554002), we get a palindrome (70058600685007).

The spelling of 20045500131005 in words is "twenty trillion, forty-five billion, five hundred million, one hundred thirty-one thousand, five".