20012227 has 4 divisors (see below), whose sum is σ = 20553136. Its totient is φ = 19471320.

The previous prime is 20012219. The next prime is 20012261. The reversal of 20012227 is 72221002.

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

It is a cyclic number.

It is not a de Polignac number, because 20012227 - 2³ = 20012219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20012227.

It is not an unprimeable number, because it can be changed into a prime (20012207) 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, 270399 + ... + 270472.

It is an arithmetic number, because the mean of its divisors is an integer number (5138284).

Almost surely, 2^20012227 is an apocalyptic number.

20012227 is a deficient number, since it is larger than the sum of its proper divisors (540909).

20012227 is an equidigital number, since it uses as much as digits as its factorization.

20012227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540908.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 20012227 is about 4473.5027662895. The cubic root of 20012227 is about 271.4970656980.

Adding to 20012227 its reverse (72221002), we get a palindrome (92233229).

The spelling of 20012227 in words is "twenty million, twelve thousand, two hundred twenty-seven".