19956227 has 2 divisors, whose sum is σ = 19956228. Its totient is φ = 19956226.

The previous prime is 19956221. The next prime is 19956329. The reversal of 19956227 is 72265991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19956227 - 2⁶ = 19956163 is a prime.

It is not a weakly prime, because it can be changed into another prime (19956221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9978113 + 9978114.

It is an arithmetic number, because the mean of its divisors is an integer number (9978114).

Almost surely, 2^19956227 is an apocalyptic number.

19956227 is a deficient number, since it is larger than the sum of its proper divisors (1).

19956227 is an equidigital number, since it uses as much as digits as its factorization.

19956227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 19956227 is about 4467.2393040893. The cubic root of 19956227 is about 271.2435866733.

The spelling of 19956227 in words is "nineteen million, nine hundred fifty-six thousand, two hundred twenty-seven".