21415338559 has 2 divisors, whose sum is σ = 21415338560. Its totient is φ = 21415338558.

The previous prime is 21415338533. The next prime is 21415338587. The reversal of 21415338559 is 95583351412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21415338559 - 2⁷ = 21415338431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21415338589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10707669279 + 10707669280.

It is an arithmetic number, because the mean of its divisors is an integer number (10707669280).

Almost surely, 2^21415338559 is an apocalyptic number.

21415338559 is a deficient number, since it is larger than the sum of its proper divisors (1).

21415338559 is an equidigital number, since it uses as much as digits as its factorization.

21415338559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648000, while the sum is 46.

The spelling of 21415338559 in words is "twenty-one billion, four hundred fifteen million, three hundred thirty-eight thousand, five hundred fifty-nine".