20475227 has 4 divisors (see below), whose sum is σ = 20513616. Its totient is φ = 20436840.

The previous prime is 20475197. The next prime is 20475253. The reversal of 20475227 is 72257402.

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 20475227 - 2⁶ = 20475163 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 20475227.

It is not an unprimeable number, because it can be changed into a prime (20475527) 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, 18383 + ... + 19464.

It is an arithmetic number, because the mean of its divisors is an integer number (5128404).

Almost surely, 2^20475227 is an apocalyptic number.

20475227 is a deficient number, since it is larger than the sum of its proper divisors (38389).

20475227 is an equidigital number, since it uses as much as digits as its factorization.

20475227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38388.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 20475227 is about 4524.9560218857. The cubic root of 20475227 is about 273.5748953502.

It can be divided in two parts, 20475 and 227, that added together give a palindrome (20702).

The spelling of 20475227 in words is "twenty million, four hundred seventy-five thousand, two hundred twenty-seven".