20136085686 has 24 divisors (see below), whose sum is σ = 44153829720. Its totient is φ = 6631160256.

The previous prime is 20136085663. The next prime is 20136085729. The reversal of 20136085686 is 68658063102.

20136085686 is a `hidden beast` number, since 20 + 1 + 3 + 60 + 8 + 568 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6737491 + ... + 6740478.

It is an arithmetic number, because the mean of its divisors is an integer number (1839742905).

Almost surely, 2^20136085686 is an apocalyptic number.

20136085686 is an abundant number, since it is smaller than the sum of its proper divisors (24017744034).

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

20136085686 is a wasteful number, since it uses less digits than its factorization.

20136085686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13478060 (or 13478057 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 20136085686 in words is "twenty billion, one hundred thirty-six million, eighty-five thousand, six hundred eighty-six".