20536686 has 16 divisors (see below), whose sum is σ = 45637200. Its totient is φ = 6845544.

The previous prime is 20536667. The next prime is 20536717. The reversal of 20536686 is 68663502.

It is a self number, because there is not a number n which added to its sum of digits gives 20536686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190101 + ... + 190208.

It is an arithmetic number, because the mean of its divisors is an integer number (2852325).

Almost surely, 2^20536686 is an apocalyptic number.

20536686 is an abundant number, since it is smaller than the sum of its proper divisors (25100514).

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

20536686 is a wasteful number, since it uses less digits than its factorization.

20536686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380320 (or 380314 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 20536686 is about 4531.7420491462. The cubic root of 20536686 is about 273.8483452243.

The spelling of 20536686 in words is "twenty million, five hundred thirty-six thousand, six hundred eighty-six".