21230323319 has 2 divisors, whose sum is σ = 21230323320. Its totient is φ = 21230323318.

The previous prime is 21230323253. The next prime is 21230323339. The reversal of 21230323319 is 91332303212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21230323319 - 2²⁰ = 21229274743 is a prime.

It is a super-2 number, since 2×21230323319² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21230323291 and 21230323300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21230323339) 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, 10615161659 + 10615161660.

It is an arithmetic number, because the mean of its divisors is an integer number (10615161660).

Almost surely, 2^21230323319 is an apocalyptic number.

21230323319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230323319 is an equidigital number, since it uses as much as digits as its factorization.

21230323319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The spelling of 21230323319 in words is "twenty-one billion, two hundred thirty million, three hundred twenty-three thousand, three hundred nineteen".