20065305 has 32 divisors (see below), whose sum is σ = 35392896. Its totient is φ = 9644544.

The previous prime is 20065301. The next prime is 20065307. The reversal of 20065305 is 50356002.

It is not a de Polignac number, because 20065305 - 2² = 20065301 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20065301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7189 + ... + 9581.

It is an arithmetic number, because the mean of its divisors is an integer number (1106028).

Almost surely, 2^20065305 is an apocalyptic number.

It is an amenable number.

20065305 is a deficient number, since it is larger than the sum of its proper divisors (15327591).

20065305 is a wasteful number, since it uses less digits than its factorization.

20065305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 20065305 is about 4479.4313255144. The cubic root of 20065305 is about 271.7368824153.

The spelling of 20065305 in words is "twenty million, sixty-five thousand, three hundred five".