20795865 has 16 divisors (see below), whose sum is σ = 33427968. Its totient is φ = 11039616.

The previous prime is 20795851. The next prime is 20795891. The reversal of 20795865 is 56859702.

It is not a de Polignac number, because 20795865 - 2⁴ = 20795849 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237 + ... + 6453.

It is an arithmetic number, because the mean of its divisors is an integer number (2089248).

Almost surely, 2^20795865 is an apocalyptic number.

It is an amenable number.

20795865 is a deficient number, since it is larger than the sum of its proper divisors (12632103).

20795865 is a wasteful number, since it uses less digits than its factorization.

20795865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6448.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 20795865 is about 4560.2483485003. The cubic root of 20795865 is about 274.9955481373.

The spelling of 20795865 in words is "twenty million, seven hundred ninety-five thousand, eight hundred sixty-five".