20124530435205 has 48 divisors (see below), whose sum is σ = 39970923358080. Its totient is φ = 9175511447424.

The previous prime is 20124530435153. The next prime is 20124530435323. The reversal of 20124530435205 is 50253403542102.

20124530435205 is a `hidden beast` number, since 2 + 0 + 12 + 4 + 5 + 3 + 0 + 435 + 205 = 666.

It is not a de Polignac number, because 20124530435205 - 2⁸ = 20124530434949 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20124530435205.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 84164782 + ... + 84403551.

It is an arithmetic number, because the mean of its divisors is an integer number (832727569960).

Almost surely, 2^{20124530435205} is an apocalyptic number.

It is an amenable number.

20124530435205 is a deficient number, since it is larger than the sum of its proper divisors (19846392922875).

20124530435205 is a wasteful number, since it uses less digits than its factorization.

20124530435205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168568730 (or 168568727 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 20124530435205 its reverse (50253403542102), we get a palindrome (70377933977307).

The spelling of 20124530435205 in words is "twenty trillion, one hundred twenty-four billion, five hundred thirty million, four hundred thirty-five thousand, two hundred five".