20641227 has 8 divisors (see below), whose sum is σ = 28265616. Its totient is φ = 13388832.

The previous prime is 20641223. The next prime is 20641253. The reversal of 20641227 is 72214602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20641227 - 2² = 20641223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20641197 and 20641206.

It is not an unprimeable number, because it can be changed into a prime (20641223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92868 + ... + 93089.

It is an arithmetic number, because the mean of its divisors is an integer number (3533202).

Almost surely, 2^20641227 is an apocalyptic number.

20641227 is a deficient number, since it is larger than the sum of its proper divisors (7624389).

20641227 is a wasteful number, since it uses less digits than its factorization.

20641227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185997.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20641227 is about 4543.2617137911. The cubic root of 20641227 is about 274.3122295408.

Adding to 20641227 its reverse (72214602), we get a palindrome (92855829).

The spelling of 20641227 in words is "twenty million, six hundred forty-one thousand, two hundred twenty-seven".