21103000573 has 2 divisors, whose sum is σ = 21103000574. Its totient is φ = 21103000572.

The previous prime is 21103000547. The next prime is 21103000613. The reversal of 21103000573 is 37500030112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11791136569 + 9311864004 = 108587^2 + 96498^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103000573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21103000073) 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, 10551500286 + 10551500287.

It is an arithmetic number, because the mean of its divisors is an integer number (10551500287).

Almost surely, 2^21103000573 is an apocalyptic number.

It is an amenable number.

21103000573 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103000573 is an equidigital number, since it uses as much as digits as its factorization.

21103000573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 22.

Adding to 21103000573 its reverse (37500030112), we get a palindrome (58603030685).

The spelling of 21103000573 in words is "twenty-one billion, one hundred three million, five hundred seventy-three", and thus it is an aban number.