21915011359 has 2 divisors, whose sum is σ = 21915011360. Its totient is φ = 21915011358.

The previous prime is 21915011351. The next prime is 21915011401. The reversal of 21915011359 is 95311051912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21915011359 - 2³ = 21915011351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21915011351) 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, 10957505679 + 10957505680.

It is an arithmetic number, because the mean of its divisors is an integer number (10957505680).

Almost surely, 2^21915011359 is an apocalyptic number.

21915011359 is a deficient number, since it is larger than the sum of its proper divisors (1).

21915011359 is an equidigital number, since it uses as much as digits as its factorization.

21915011359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 37.

The spelling of 21915011359 in words is "twenty-one billion, nine hundred fifteen million, eleven thousand, three hundred fifty-nine".