20014928505 has 96 divisors (see below), whose sum is σ = 42072855552. Its totient is φ = 8668684800.

The previous prime is 20014928459. The next prime is 20014928537. The reversal of 20014928505 is 50582941002.

20014928505 is a `hidden beast` number, since 2 + 0 + 0 + 149 + 2 + 8 + 505 = 666.

It is not a de Polignac number, because 20014928505 - 2⁹ = 20014927993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20014928505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 149319 + ... + 249651.

It is an arithmetic number, because the mean of its divisors is an integer number (438258912).

Almost surely, 2^20014928505 is an apocalyptic number.

It is an amenable number.

20014928505 is an abundant number, since it is smaller than the sum of its proper divisors (22057927047).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20014928505 is a wasteful number, since it uses less digits than its factorization.

20014928505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100399 (or 100396 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 20014928505 in words is "twenty billion, fourteen million, nine hundred twenty-eight thousand, five hundred five".