21596065943 has 2 divisors, whose sum is σ = 21596065944. Its totient is φ = 21596065942.

The previous prime is 21596065919. The next prime is 21596065961. The reversal of 21596065943 is 34956069512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21596065943 - 2⁶ = 21596065879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21596065891 and 21596065900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21596065903) 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, 10798032971 + 10798032972.

It is an arithmetic number, because the mean of its divisors is an integer number (10798032972).

Almost surely, 2^21596065943 is an apocalyptic number.

21596065943 is a deficient number, since it is larger than the sum of its proper divisors (1).

21596065943 is an equidigital number, since it uses as much as digits as its factorization.

21596065943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The spelling of 21596065943 in words is "twenty-one billion, five hundred ninety-six million, sixty-five thousand, nine hundred forty-three".