20355227 has 4 divisors (see below), whose sum is σ = 20368176. Its totient is φ = 20342280.

The previous prime is 20355221. The next prime is 20355241. The reversal of 20355227 is 72255302.

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 20355227 - 2¹⁰ = 20354203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20355196 and 20355205.

It is not an unprimeable number, because it can be changed into a prime (20355221) 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, 3728 + ... + 7389.

It is an arithmetic number, because the mean of its divisors is an integer number (5092044).

Almost surely, 2^20355227 is an apocalyptic number.

20355227 is a deficient number, since it is larger than the sum of its proper divisors (12949).

20355227 is a wasteful number, since it uses less digits than its factorization.

20355227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12948.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 20355227 is about 4511.6767393066. The cubic root of 20355227 is about 273.0393973206.

The spelling of 20355227 in words is "twenty million, three hundred fifty-five thousand, two hundred twenty-seven".