21435463559 has 2 divisors, whose sum is σ = 21435463560. Its totient is φ = 21435463558.

The previous prime is 21435463531. The next prime is 21435463597. The reversal of 21435463559 is 95536453412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21435463559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21435463459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10717731779 + 10717731780.

It is an arithmetic number, because the mean of its divisors is an integer number (10717731780).

Almost surely, 2^21435463559 is an apocalyptic number.

21435463559 is a deficient number, since it is larger than the sum of its proper divisors (1).

21435463559 is an equidigital number, since it uses as much as digits as its factorization.

21435463559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944000, while the sum is 47.

The spelling of 21435463559 in words is "twenty-one billion, four hundred thirty-five million, four hundred sixty-three thousand, five hundred fifty-nine".