21588689659 has 2 divisors, whose sum is σ = 21588689660. Its totient is φ = 21588689658.

The previous prime is 21588689611. The next prime is 21588689671. The reversal of 21588689659 is 95698688512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21588689659 - 2¹⁵ = 21588656891 is a prime.

It is a super-2 number, since 2×21588689659² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21588689594 and 21588689603.

It is not a weakly prime, because it can be changed into another prime (21588789659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10794344829 + 10794344830.

It is an arithmetic number, because the mean of its divisors is an integer number (10794344830).

Almost surely, 2^21588689659 is an apocalyptic number.

21588689659 is a deficient number, since it is larger than the sum of its proper divisors (1).

21588689659 is an equidigital number, since it uses as much as digits as its factorization.

21588689659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74649600, while the sum is 67.

The spelling of 21588689659 in words is "twenty-one billion, five hundred eighty-eight million, six hundred eighty-nine thousand, six hundred fifty-nine".