21588786095867 has 2 divisors, whose sum is σ = 21588786095868. Its totient is φ = 21588786095866.

The previous prime is 21588786095831. The next prime is 21588786095869. The reversal of 21588786095867 is 76859068788512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21588786095867 is a prime.

It is a super-2 number, since 2×21588786095867² (a number of 27 digits) contains 22 as substring.

Together with 21588786095869, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21588786095791 and 21588786095800.

It is not a weakly prime, because it can be changed into another prime (21588786095869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10794393047933 + 10794393047934.

It is an arithmetic number, because the mean of its divisors is an integer number (10794393047934).

Almost surely, 2^{21588786095867} is an apocalyptic number.

21588786095867 is a deficient number, since it is larger than the sum of its proper divisors (1).

21588786095867 is an equidigital number, since it uses as much as digits as its factorization.

21588786095867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3251404800, while the sum is 80.

The spelling of 21588786095867 in words is "twenty-one trillion, five hundred eighty-eight billion, seven hundred eighty-six million, ninety-five thousand, eight hundred sixty-seven".