21587609976227 has 2 divisors, whose sum is σ = 21587609976228. Its totient is φ = 21587609976226.

The previous prime is 21587609976221. The next prime is 21587609976241. The reversal of 21587609976227 is 72267990678512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21587609976227 - 2²⁸ = 21587341540771 is a prime.

It is not a weakly prime, because it can be changed into another prime (21587609976221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10793804988113 + 10793804988114.

It is an arithmetic number, because the mean of its divisors is an integer number (10793804988114).

Almost surely, 2^{21587609976227} is an apocalyptic number.

21587609976227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21587609976227 is an equidigital number, since it uses as much as digits as its factorization.

21587609976227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320060160, while the sum is 71.

The spelling of 21587609976227 in words is "twenty-one trillion, five hundred eighty-seven billion, six hundred nine million, nine hundred seventy-six thousand, two hundred twenty-seven".