21713034347 has 4 divisors (see below), whose sum is σ = 21713382600. Its totient is φ = 21712686096.

The previous prime is 21713034271. The next prime is 21713034373. The reversal of 21713034347 is 74343031712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21713034347 - 2²⁴ = 21696257131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21713034397) 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 in 3 ways as a sum of consecutive naturals, for example, 52097 + ... + 214802.

It is an arithmetic number, because the mean of its divisors is an integer number (5428345650).

Almost surely, 2^21713034347 is an apocalyptic number.

21713034347 is a deficient number, since it is larger than the sum of its proper divisors (348253).

21713034347 is an equidigital number, since it uses as much as digits as its factorization.

21713034347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348252.

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 21713034347 in words is "twenty-one billion, seven hundred thirteen million, thirty-four thousand, three hundred forty-seven".