21304102343 has 2 divisors, whose sum is σ = 21304102344. Its totient is φ = 21304102342.

The previous prime is 21304102333. The next prime is 21304102399. The reversal of 21304102343 is 34320140312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21304102343 - 2¹⁰ = 21304101319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21304102333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10652051171 + 10652051172.

It is an arithmetic number, because the mean of its divisors is an integer number (10652051172).

Almost surely, 2^21304102343 is an apocalyptic number.

21304102343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21304102343 is an equidigital number, since it uses as much as digits as its factorization.

21304102343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21304102343 its reverse (34320140312), we get a palindrome (55624242655).

The spelling of 21304102343 in words is "twenty-one billion, three hundred four million, one hundred two thousand, three hundred forty-three".