21304300213 has 12 divisors (see below), whose sum is σ = 24801734892. Its totient is φ = 18246695040.

The previous prime is 21304300207. The next prime is 21304300253. The reversal of 21304300213 is 31200340312.

It can be written as a sum of positive squares in 2 ways, for example, as 14655039364 + 6649260849 = 121058^2 + 81543^2 .

It is not a de Polignac number, because 21304300213 - 2⁵ = 21304300181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304300253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104058 + ... + 231163.

It is an arithmetic number, because the mean of its divisors is an integer number (2066811241).

Almost surely, 2^21304300213 is an apocalyptic number.

It is an amenable number.

21304300213 is a deficient number, since it is larger than the sum of its proper divisors (3497434679).

21304300213 is a wasteful number, since it uses less digits than its factorization.

21304300213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336532 (or 336525 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21304300213 its reverse (31200340312), we get a palindrome (52504640525).

The spelling of 21304300213 in words is "twenty-one billion, three hundred four million, three hundred thousand, two hundred thirteen".