21034210063 has 2 divisors, whose sum is σ = 21034210064. Its totient is φ = 21034210062.

The previous prime is 21034210051. The next prime is 21034210073. The reversal of 21034210063 is 36001243012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21034210063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21034210073) 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, 10517105031 + 10517105032.

It is an arithmetic number, because the mean of its divisors is an integer number (10517105032).

Almost surely, 2^21034210063 is an apocalyptic number.

21034210063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21034210063 is an equidigital number, since it uses as much as digits as its factorization.

21034210063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21034210063 its reverse (36001243012), we get a palindrome (57035453075).

The spelling of 21034210063 in words is "twenty-one billion, thirty-four million, two hundred ten thousand, sixty-three".