20868227 has 4 divisors (see below), whose sum is σ = 20884800. Its totient is φ = 20851656.

The previous prime is 20868217. The next prime is 20868257. The reversal of 20868227 is 72286802.

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 20868227 - 2⁸ = 20867971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20868217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6227 + ... + 8972.

It is an arithmetic number, because the mean of its divisors is an integer number (5221200).

Almost surely, 2^20868227 is an apocalyptic number.

20868227 is a deficient number, since it is larger than the sum of its proper divisors (16573).

20868227 is a wasteful number, since it uses less digits than its factorization.

20868227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16572.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 20868227 is about 4568.1754563502. The cubic root of 20868227 is about 275.3141401858.

The spelling of 20868227 in words is "twenty million, eight hundred sixty-eight thousand, two hundred twenty-seven".