21089656583 has 2 divisors, whose sum is σ = 21089656584. Its totient is φ = 21089656582.

The previous prime is 21089656519. The next prime is 21089656591. The reversal of 21089656583 is 38565698012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21089656583 - 2⁶ = 21089656519 is a prime.

It is a super-2 number, since 2×21089656583² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21089656513) 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, 10544828291 + 10544828292.

It is an arithmetic number, because the mean of its divisors is an integer number (10544828292).

Almost surely, 2^21089656583 is an apocalyptic number.

21089656583 is a deficient number, since it is larger than the sum of its proper divisors (1).

21089656583 is an equidigital number, since it uses as much as digits as its factorization.

21089656583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 21089656583 in words is "twenty-one billion, eighty-nine million, six hundred fifty-six thousand, five hundred eighty-three".