20535205113 has 12 divisors (see below), whose sum is σ = 29666220948. Its totient is φ = 13688171520.

The previous prime is 20535205081. The next prime is 20535205139. The reversal of 20535205113 is 31150253502.

It is a happy number.

20535205113 is a `hidden beast` number, since 20 + 5 + 3 + 520 + 5 + 113 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 583077609 + 19952127504 = 24147^2 + 141252^2 .

It is not a de Polignac number, because 20535205113 - 2⁵ = 20535205081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20535203113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96120 + ... + 224297.

It is an arithmetic number, because the mean of its divisors is an integer number (2472185079).

Almost surely, 2^20535205113 is an apocalyptic number.

It is an amenable number.

20535205113 is a deficient number, since it is larger than the sum of its proper divisors (9131015835).

20535205113 is a wasteful number, since it uses less digits than its factorization.

20535205113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327544 (or 327541 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 20535205113 its reverse (31150253502), we get a palindrome (51685458615).

The spelling of 20535205113 in words is "twenty billion, five hundred thirty-five million, two hundred five thousand, one hundred thirteen".