21113024573 has 2 divisors, whose sum is σ = 21113024574. Its totient is φ = 21113024572.

The previous prime is 21113024521. The next prime is 21113024587. The reversal of 21113024573 is 37542031112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21024420004 + 88604569 = 144998^2 + 9413^2 .

It is a cyclic number.

It is not a de Polignac number, because 21113024573 - 2¹⁶ = 21112959037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113024503) 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, 10556512286 + 10556512287.

It is an arithmetic number, because the mean of its divisors is an integer number (10556512287).

Almost surely, 2^21113024573 is an apocalyptic number.

It is an amenable number.

21113024573 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113024573 is an equidigital number, since it uses as much as digits as its factorization.

21113024573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 21113024573 its reverse (37542031112), we get a palindrome (58655055685).

The spelling of 21113024573 in words is "twenty-one billion, one hundred thirteen million, twenty-four thousand, five hundred seventy-three".