20305227 has 4 divisors (see below), whose sum is σ = 27073640. Its totient is φ = 13536816.

The previous prime is 20305213. The next prime is 20305231. The reversal of 20305227 is 72250302.

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

It is not a de Polignac number, because 20305227 - 2⁴ = 20305211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20305247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3384202 + ... + 3384207.

It is an arithmetic number, because the mean of its divisors is an integer number (6768410).

Almost surely, 2^20305227 is an apocalyptic number.

20305227 is a deficient number, since it is larger than the sum of its proper divisors (6768413).

20305227 is an equidigital number, since it uses as much as digits as its factorization.

20305227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6768412.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 20305227 is about 4506.1321551859. The cubic root of 20305227 is about 272.8156519529.

Adding to 20305227 its reverse (72250302), we get a palindrome (92555529).

The spelling of 20305227 in words is "twenty million, three hundred five thousand, two hundred twenty-seven".