20814688 has 24 divisors (see below), whose sum is σ = 41164200. Its totient is φ = 10360320.

The previous prime is 20814679. The next prime is 20814691. The reversal of 20814688 is 88641802.

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, 6363 + ... + 9061.

It is an arithmetic number, because the mean of its divisors is an integer number (1715175).

Almost surely, 2^20814688 is an apocalyptic number.

It is an amenable number.

20814688 is a deficient number, since it is larger than the sum of its proper divisors (20349512).

20814688 is a wasteful number, since it uses less digits than its factorization.

20814688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950 (or 2942 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 20814688 is about 4562.3116947442. The cubic root of 20814688 is about 275.0784921947.

The spelling of 20814688 in words is "twenty million, eight hundred fourteen thousand, six hundred eighty-eight".