21319664383 has 2 divisors, whose sum is σ = 21319664384. Its totient is φ = 21319664382.

The previous prime is 21319664369. The next prime is 21319664411. The reversal of 21319664383 is 38346691312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21319664383 - 2²⁵ = 21286109951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21319664323) 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, 10659832191 + 10659832192.

It is an arithmetic number, because the mean of its divisors is an integer number (10659832192).

Almost surely, 2^21319664383 is an apocalyptic number.

21319664383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21319664383 is an equidigital number, since it uses as much as digits as its factorization.

21319664383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 46.

The spelling of 21319664383 in words is "twenty-one billion, three hundred nineteen million, six hundred sixty-four thousand, three hundred eighty-three".