20520710185 has 16 divisors (see below), whose sum is σ = 25561078272. Its totient is φ = 15803870400.

The previous prime is 20520710179. The next prime is 20520710209. The reversal of 20520710185 is 58101702502.

It is not a de Polignac number, because 20520710185 - 2⁷ = 20520710057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701421 + ... + 730090.

It is an arithmetic number, because the mean of its divisors is an integer number (1597567392).

Almost surely, 2^20520710185 is an apocalyptic number.

It is an amenable number.

20520710185 is a deficient number, since it is larger than the sum of its proper divisors (5040368087).

20520710185 is a wasteful number, since it uses less digits than its factorization.

20520710185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431624.

The product of its (nonzero) digits is 5600, while the sum is 31.

The spelling of 20520710185 in words is "twenty billion, five hundred twenty million, seven hundred ten thousand, one hundred eighty-five".