20541688 has 16 divisors (see below), whose sum is σ = 38610000. Its totient is φ = 10245696.

The previous prime is 20541671. The next prime is 20541701. The reversal of 20541688 is 88614502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588 + ... + 6436.

It is an arithmetic number, because the mean of its divisors is an integer number (2413125).

Almost surely, 2^20541688 is an apocalyptic number.

It is an amenable number.

20541688 is a deficient number, since it is larger than the sum of its proper divisors (18068312).

20541688 is a wasteful number, since it uses less digits than its factorization.

20541688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6294 (or 6290 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 20541688 is about 4532.2939004438. The cubic root of 20541688 is about 273.8705766305.

The spelling of 20541688 in words is "twenty million, five hundred forty-one thousand, six hundred eighty-eight".