20535018500005 has 4 divisors (see below), whose sum is σ = 24642022200012. Its totient is φ = 16428014800000.

The previous prime is 20535018499913. The next prime is 20535018500023. The reversal of 20535018500005 is 50000581053502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8698122750564 + 11836895749441 = 2949258^2 + 3440479^2 .

It is not a de Polignac number, because 20535018500005 - 2⁹ = 20535018499493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053501849996 + ... + 2053501850005.

It is an arithmetic number, because the mean of its divisors is an integer number (6160505550003).

Almost surely, 2^{20535018500005} is an apocalyptic number.

It is an amenable number.

20535018500005 is a deficient number, since it is larger than the sum of its proper divisors (4107003700007).

20535018500005 is an equidigital number, since it uses as much as digits as its factorization.

20535018500005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107003700006.

The product of its (nonzero) digits is 30000, while the sum is 34.

Adding to 20535018500005 its reverse (50000581053502), we get a palindrome (70535599553507).

The spelling of 20535018500005 in words is "twenty trillion, five hundred thirty-five billion, eighteen million, five hundred thousand, five".