20565814 has 12 divisors (see below), whose sum is σ = 31951764. Its totient is φ = 9927512.

The previous prime is 20565799. The next prime is 20565817. The reversal of 20565814 is 41856502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20565817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4432 + ... + 7795.

It is an arithmetic number, because the mean of its divisors is an integer number (2662647).

Almost surely, 2^20565814 is an apocalyptic number.

20565814 is a deficient number, since it is larger than the sum of its proper divisors (11385950).

20565814 is a wasteful number, since it uses less digits than its factorization.

20565814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12287 (or 12258 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 20565814 is about 4534.9546855509. The cubic root of 20565814 is about 273.9777540680.

The spelling of 20565814 in words is "twenty million, five hundred sixty-five thousand, eight hundred fourteen".