21828287417 has 2 divisors, whose sum is σ = 21828287418. Its totient is φ = 21828287416.

The previous prime is 21828287401. The next prime is 21828287449. The reversal of 21828287417 is 71478282812.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17207142976 + 4621144441 = 131176^2 + 67979^2 .

It is a cyclic number.

It is not a de Polignac number, because 21828287417 - 2⁴ = 21828287401 is a prime.

It is not a weakly prime, because it can be changed into another prime (21828287477) 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, 10914143708 + 10914143709.

It is an arithmetic number, because the mean of its divisors is an integer number (10914143709).

Almost surely, 2^21828287417 is an apocalyptic number.

It is an amenable number.

21828287417 is a deficient number, since it is larger than the sum of its proper divisors (1).

21828287417 is an equidigital number, since it uses as much as digits as its factorization.

21828287417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 802816, while the sum is 50.

The spelling of 21828287417 in words is "twenty-one billion, eight hundred twenty-eight million, two hundred eighty-seven thousand, four hundred seventeen".