20535688 has 32 divisors (see below), whose sum is σ = 40435200. Its totient is φ = 9758848.

The previous prime is 20535661. The next prime is 20535689. The reversal of 20535688 is 88653502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42633 + ... + 43111.

It is an arithmetic number, because the mean of its divisors is an integer number (1263600).

Almost surely, 2^20535688 is an apocalyptic number.

It is an amenable number.

20535688 is a deficient number, since it is larger than the sum of its proper divisors (19899512).

20535688 is a wasteful number, since it uses less digits than its factorization.

20535688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 20535688 is about 4531.6319356276. The cubic root of 20535688 is about 273.8439091779.

The spelling of 20535688 in words is "twenty million, five hundred thirty-five thousand, six hundred eighty-eight".