21300319 has 2 divisors, whose sum is σ = 21300320. Its totient is φ = 21300318.

The previous prime is 21300289. The next prime is 21300341. The reversal of 21300319 is 91300312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21300319 - 2⁵ = 21300287 is a prime.

It is a super-2 number, since 2×21300319² = 907407179003522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21300296 and 21300305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21300359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650159 + 10650160.

It is an arithmetic number, because the mean of its divisors is an integer number (10650160).

Almost surely, 2^21300319 is an apocalyptic number.

21300319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300319 is an equidigital number, since it uses as much as digits as its factorization.

21300319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 21300319 is about 4615.2268633297. The cubic root of 21300319 is about 277.2013679989.

The spelling of 21300319 in words is "twenty-one million, three hundred thousand, three hundred nineteen".