21347307703 has 2 divisors, whose sum is σ = 21347307704. Its totient is φ = 21347307702.

The previous prime is 21347307701. The next prime is 21347307721. The reversal of 21347307703 is 30770374312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21347307703 - 2¹ = 21347307701 is a prime.

Together with 21347307701, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21347307701) 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, 10673653851 + 10673653852.

It is an arithmetic number, because the mean of its divisors is an integer number (10673653852).

Almost surely, 2^21347307703 is an apocalyptic number.

21347307703 is a deficient number, since it is larger than the sum of its proper divisors (1).

21347307703 is an equidigital number, since it uses as much as digits as its factorization.

21347307703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74088, while the sum is 37.

The spelling of 21347307703 in words is "twenty-one billion, three hundred forty-seven million, three hundred seven thousand, seven hundred three".