20065895 has 4 divisors (see below), whose sum is σ = 24079080. Its totient is φ = 16052712.

The previous prime is 20065849. The next prime is 20065909. The reversal of 20065895 is 59856002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59856002 = 2 ⋅29928001.

It is a cyclic number.

It is not a de Polignac number, because 20065895 - 2¹² = 20061799 is a prime.

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, 2006585 + ... + 2006594.

It is an arithmetic number, because the mean of its divisors is an integer number (6019770).

Almost surely, 2^20065895 is an apocalyptic number.

20065895 is a deficient number, since it is larger than the sum of its proper divisors (4013185).

20065895 is an equidigital number, since it uses as much as digits as its factorization.

20065895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013184.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 20065895 is about 4479.4971816042. The cubic root of 20065895 is about 271.7395457719.

The spelling of 20065895 in words is "twenty million, sixty-five thousand, eight hundred ninety-five".