20311141013505 has 24 divisors (see below), whose sum is σ = 35267634504960. Its totient is φ = 10813637233440.

The previous prime is 20311141013453. The next prime is 20311141013633. The reversal of 20311141013505 is 50531014111302.

20311141013505 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 1 + 141 + 0 + 13 + 505 = 666.

It is not a de Polignac number, because 20311141013505 - 2⁹ = 20311141012993 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 395209585 + ... + 395260974.

It is an arithmetic number, because the mean of its divisors is an integer number (1469484771040).

Almost surely, 2^{20311141013505} is an apocalyptic number.

It is an amenable number.

20311141013505 is a deficient number, since it is larger than the sum of its proper divisors (14956493491455).

20311141013505 is a wasteful number, since it uses less digits than its factorization.

20311141013505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790471141 (or 790471138 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 20311141013505 its reverse (50531014111302), we get a palindrome (70842155124807).

The spelling of 20311141013505 in words is "twenty trillion, three hundred eleven billion, one hundred forty-one million, thirteen thousand, five hundred five".