20256227 has 2 divisors, whose sum is σ = 20256228. Its totient is φ = 20256226.

The previous prime is 20256221. The next prime is 20256251. The reversal of 20256227 is 72265202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20256227 - 2¹² = 20252131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20256196 and 20256205.

It is not a weakly prime, because it can be changed into another prime (20256221) 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, 10128113 + 10128114.

It is an arithmetic number, because the mean of its divisors is an integer number (10128114).

Almost surely, 2^20256227 is an apocalyptic number.

20256227 is a deficient number, since it is larger than the sum of its proper divisors (1).

20256227 is an equidigital number, since it uses as much as digits as its factorization.

20256227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 20256227 is about 4500.6918357070. The cubic root of 20256227 is about 272.5960248515.

The spelling of 20256227 in words is "twenty million, two hundred fifty-six thousand, two hundred twenty-seven".