21432304307 has 2 divisors, whose sum is σ = 21432304308. Its totient is φ = 21432304306.

The previous prime is 21432304261. The next prime is 21432304339. The reversal of 21432304307 is 70340323412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21432304307 - 2⁸ = 21432304051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21432304307.

It is not a weakly prime, because it can be changed into another prime (21432306307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716152153 + 10716152154.

It is an arithmetic number, because the mean of its divisors is an integer number (10716152154).

Almost surely, 2^21432304307 is an apocalyptic number.

21432304307 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432304307 is an equidigital number, since it uses as much as digits as its factorization.

21432304307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 29.

Adding to 21432304307 its reverse (70340323412), we get a palindrome (91772627719).

The spelling of 21432304307 in words is "twenty-one billion, four hundred thirty-two million, three hundred four thousand, three hundred seven".