21008282419 has 2 divisors, whose sum is σ = 21008282420. Its totient is φ = 21008282418.

The previous prime is 21008282417. The next prime is 21008282521. The reversal of 21008282419 is 91428280012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21008282419 - 2¹ = 21008282417 is a prime.

It is a super-2 number, since 2×21008282419² (a number of 21 digits) contains 22 as substring.

Together with 21008282417, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21008282417) 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, 10504141209 + 10504141210.

It is an arithmetic number, because the mean of its divisors is an integer number (10504141210).

Almost surely, 2^21008282419 is an apocalyptic number.

21008282419 is the 83683-rd hex number.

21008282419 is a deficient number, since it is larger than the sum of its proper divisors (1).

21008282419 is an equidigital number, since it uses as much as digits as its factorization.

21008282419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 37.

The spelling of 21008282419 in words is "twenty-one billion, eight million, two hundred eighty-two thousand, four hundred nineteen".