21332144240453 has 2 divisors, whose sum is σ = 21332144240454. Its totient is φ = 21332144240452.

The previous prime is 21332144240401. The next prime is 21332144240479. The reversal of 21332144240453 is 35404244123312.

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., 21161858440804 + 170285799649 = 4600202^2 + 412657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21332144240453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21332144240153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666072120226 + 10666072120227.

It is an arithmetic number, because the mean of its divisors is an integer number (10666072120227).

Almost surely, 2^{21332144240453} is an apocalyptic number.

It is an amenable number.

21332144240453 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332144240453 is an equidigital number, since it uses as much as digits as its factorization.

21332144240453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 38.

Adding to 21332144240453 its reverse (35404244123312), we get a palindrome (56736388363765).

The spelling of 21332144240453 in words is "twenty-one trillion, three hundred thirty-two billion, one hundred forty-four million, two hundred forty thousand, four hundred fifty-three".