21350585903 has 2 divisors, whose sum is σ = 21350585904. Its totient is φ = 21350585902.

The previous prime is 21350585897. The next prime is 21350585909. The reversal of 21350585903 is 30958505312.

It is a balanced prime because it is at equal distance from previous prime (21350585897) and next prime (21350585909).

It is a cyclic number.

It is not a de Polignac number, because 21350585903 - 2¹² = 21350581807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21350585909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10675292951 + 10675292952.

It is an arithmetic number, because the mean of its divisors is an integer number (10675292952).

Almost surely, 2^21350585903 is an apocalyptic number.

21350585903 is a deficient number, since it is larger than the sum of its proper divisors (1).

21350585903 is an equidigital number, since it uses as much as digits as its factorization.

21350585903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 21350585903 in words is "twenty-one billion, three hundred fifty million, five hundred eighty-five thousand, nine hundred three".