20227247 has 2 divisors, whose sum is σ = 20227248. Its totient is φ = 20227246.

The previous prime is 20227241. The next prime is 20227279. The reversal of 20227247 is 74272202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20227247 - 2⁴ = 20227231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20227241) 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 as a sum of consecutive naturals, namely, 10113623 + 10113624.

It is an arithmetic number, because the mean of its divisors is an integer number (10113624).

Almost surely, 2^20227247 is an apocalyptic number.

20227247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20227247 is an equidigital number, since it uses as much as digits as its factorization.

20227247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 20227247 is about 4497.4711783401. The cubic root of 20227247 is about 272.4659643825.

Adding to 20227247 its reverse (74272202), we get a palindrome (94499449).

The spelling of 20227247 in words is "twenty million, two hundred twenty-seven thousand, two hundred forty-seven".