20065306 has 4 divisors (see below), whose sum is σ = 30097962. Its totient is φ = 10032652.

The previous prime is 20065301. The next prime is 20065307. The reversal of 20065306 is 60356002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18844281 + 1221025 = 4341^2 + 1105^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 5016325 + ... + 5016328.

Almost surely, 2^20065306 is an apocalyptic number.

20065306 is a deficient number, since it is larger than the sum of its proper divisors (10032656).

20065306 is a wasteful number, since it uses less digits than its factorization.

20065306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10032655.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 20065306 is about 4479.4314371357. The cubic root of 20065306 is about 271.7368869295.

The spelling of 20065306 in words is "twenty million, sixty-five thousand, three hundred six".