21313013347 has 2 divisors, whose sum is σ = 21313013348. Its totient is φ = 21313013346.

The previous prime is 21313013333. The next prime is 21313013369. The reversal of 21313013347 is 74331031312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21313013347 - 2⁷ = 21313013219 is a prime.

It is not a weakly prime, because it can be changed into another prime (21313013327) 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, 10656506673 + 10656506674.

It is an arithmetic number, because the mean of its divisors is an integer number (10656506674).

Almost surely, 2^21313013347 is an apocalyptic number.

21313013347 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313013347 is an equidigital number, since it uses as much as digits as its factorization.

21313013347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

Adding to 21313013347 its reverse (74331031312), we get a palindrome (95644044659).

The spelling of 21313013347 in words is "twenty-one billion, three hundred thirteen million, thirteen thousand, three hundred forty-seven".