21432324313 has 2 divisors, whose sum is σ = 21432324314. Its totient is φ = 21432324312.

The previous prime is 21432324271. The next prime is 21432324317. The reversal of 21432324313 is 31342323412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13934149849 + 7498174464 = 118043^2 + 86592^2 .

It is a cyclic number.

It is not a de Polignac number, because 21432324313 - 2¹³ = 21432316121 is a prime.

It is a super-2 number, since 2×21432324313² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21432324317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716162156 + 10716162157.

It is an arithmetic number, because the mean of its divisors is an integer number (10716162157).

Almost surely, 2^21432324313 is an apocalyptic number.

It is an amenable number.

21432324313 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432324313 is an equidigital number, since it uses as much as digits as its factorization.

21432324313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 28.

Adding to 21432324313 its reverse (31342323412), we get a palindrome (52774647725).

Subtracting 21432324313 from its reverse (31342323412), we obtain a palindrome (9909999099).

The spelling of 21432324313 in words is "twenty-one billion, four hundred thirty-two million, three hundred twenty-four thousand, three hundred thirteen".