21830351659 has 2 divisors, whose sum is σ = 21830351660. Its totient is φ = 21830351658.

The previous prime is 21830351657. The next prime is 21830351677. The reversal of 21830351659 is 95615303812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21830351659 - 2¹ = 21830351657 is a prime.

Together with 21830351657, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21830351657) 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, 10915175829 + 10915175830.

It is an arithmetic number, because the mean of its divisors is an integer number (10915175830).

Almost surely, 2^21830351659 is an apocalyptic number.

21830351659 is a deficient number, since it is larger than the sum of its proper divisors (1).

21830351659 is an equidigital number, since it uses as much as digits as its factorization.

21830351659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

It can be divided in two parts, 218303 and 51659, that added together give a palindrome (269962).

The spelling of 21830351659 in words is "twenty-one billion, eight hundred thirty million, three hundred fifty-one thousand, six hundred fifty-nine".