20565795 has 16 divisors (see below), whose sum is σ = 34336512. Its totient is φ = 10491360.

The previous prime is 20565773. The next prime is 20565799. The reversal of 20565795 is 59756502.

It is not a de Polignac number, because 20565795 - 2⁶ = 20565731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20565799) 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, 29461 + ... + 30150.

It is an arithmetic number, because the mean of its divisors is an integer number (2146032).

Almost surely, 2^20565795 is an apocalyptic number.

20565795 is a deficient number, since it is larger than the sum of its proper divisors (13770717).

20565795 is a wasteful number, since it uses less digits than its factorization.

20565795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59642.

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 20565795 is about 4534.9525907114. The cubic root of 20565795 is about 273.9776696953.

The spelling of 20565795 in words is "twenty million, five hundred sixty-five thousand, seven hundred ninety-five".