20385227 has 4 divisors (see below), whose sum is σ = 21584376. Its totient is φ = 19186080.

The previous prime is 20385223. The next prime is 20385247. The reversal of 20385227 is 72258302.

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 20385227 - 2² = 20385223 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 20385227.

It is not an unprimeable number, because it can be changed into a prime (20385223) 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, 599549 + ... + 599582.

It is an arithmetic number, because the mean of its divisors is an integer number (5396094).

Almost surely, 2^20385227 is an apocalyptic number.

20385227 is a deficient number, since it is larger than the sum of its proper divisors (1199149).

20385227 is a wasteful number, since it uses less digits than its factorization.

20385227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199148.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20385227 is about 4515.0002214839. Note that the first 3 decimals coincide. The cubic root of 20385227 is about 273.1734687165.

The spelling of 20385227 in words is "twenty million, three hundred eighty-five thousand, two hundred twenty-seven".