20536887 has 16 divisors (see below), whose sum is σ = 32141312. Its totient is φ = 11417760.

The previous prime is 20536847. The next prime is 20536889. The reversal of 20536887 is 78863502.

It is not a de Polignac number, because 20536887 - 2⁶ = 20536823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20536889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12439 + ... + 13992.

It is an arithmetic number, because the mean of its divisors is an integer number (2008832).

Almost surely, 2^20536887 is an apocalyptic number.

20536887 is a deficient number, since it is larger than the sum of its proper divisors (11604425).

20536887 is a wasteful number, since it uses less digits than its factorization.

20536887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26478.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 20536887 is about 4531.7642259941. The cubic root of 20536887 is about 273.8492386391.

The spelling of 20536887 in words is "twenty million, five hundred thirty-six thousand, eight hundred eighty-seven".