20136560085 has 48 divisors (see below), whose sum is σ = 35754521088. Its totient is φ = 10478160000.

The previous prime is 20136560039. The next prime is 20136560113. The reversal of 20136560085 is 58006563102.

20136560085 is a `hidden beast` number, since 2 + 0 + 13 + 6 + 560 + 0 + 85 = 666.

It is not a de Polignac number, because 20136560085 - 2¹⁴ = 20136543701 is a prime.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 1912335 + ... + 1922835.

It is an arithmetic number, because the mean of its divisors is an integer number (744885856).

Almost surely, 2^20136560085 is an apocalyptic number.

It is an amenable number.

20136560085 is a deficient number, since it is larger than the sum of its proper divisors (15617961003).

20136560085 is a wasteful number, since it uses less digits than its factorization.

20136560085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11546 (or 11543 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 20136560085 in words is "twenty billion, one hundred thirty-six million, five hundred sixty thousand, eighty-five".