21324010004573 has 2 divisors, whose sum is σ = 21324010004574. Its totient is φ = 21324010004572.

The previous prime is 21324010004537. The next prime is 21324010004599. The reversal of 21324010004573 is 37540001042312.

Together with previous prime (21324010004537) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12979000559044 + 8345009445529 = 3602638^2 + 2888773^2 .

It is a cyclic number.

It is not a de Polignac number, because 21324010004573 - 2⁴² = 16925963493469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21324010024573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10662005002286 + 10662005002287.

It is an arithmetic number, because the mean of its divisors is an integer number (10662005002287).

Almost surely, 2^{21324010004573} is an apocalyptic number.

It is an amenable number.

21324010004573 is a deficient number, since it is larger than the sum of its proper divisors (1).

21324010004573 is an equidigital number, since it uses as much as digits as its factorization.

21324010004573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

Adding to 21324010004573 its reverse (37540001042312), we get a palindrome (58864011046885).

The spelling of 21324010004573 in words is "twenty-one trillion, three hundred twenty-four billion, ten million, four thousand, five hundred seventy-three".