20523227 has 2 divisors, whose sum is σ = 20523228. Its totient is φ = 20523226.

The previous prime is 20523221. The next prime is 20523241. The reversal of 20523227 is 72232502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20523227 is a prime.

It is a super-3 number, since 3×20523227³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20523221) 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, 10261613 + 10261614.

It is an arithmetic number, because the mean of its divisors is an integer number (10261614).

Almost surely, 2^20523227 is an apocalyptic number.

20523227 is a deficient number, since it is larger than the sum of its proper divisors (1).

20523227 is an equidigital number, since it uses as much as digits as its factorization.

20523227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20523227 is about 4530.2568359862. The cubic root of 20523227 is about 273.7885087226.

Adding to 20523227 its reverse (72232502), we get a palindrome (92755729).

It can be divided in two parts, 205 and 23227, that added together give a palindrome (23432).

The spelling of 20523227 in words is "twenty million, five hundred twenty-three thousand, two hundred twenty-seven".