21704700713 has 4 divisors (see below), whose sum is σ = 21979443840. Its totient is φ = 21429957588.

The previous prime is 21704700707. The next prime is 21704700733. The reversal of 21704700713 is 31700740712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21704700713 - 2³⁴ = 4524831529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21704700713.

It is not an unprimeable number, because it can be changed into a prime (21704700733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137371445 + ... + 137371602.

It is an arithmetic number, because the mean of its divisors is an integer number (5494860960).

Almost surely, 2^21704700713 is an apocalyptic number.

It is an amenable number.

21704700713 is a deficient number, since it is larger than the sum of its proper divisors (274743127).

21704700713 is an equidigital number, since it uses as much as digits as its factorization.

21704700713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274743126.

The product of its (nonzero) digits is 8232, while the sum is 32.

The spelling of 21704700713 in words is "twenty-one billion, seven hundred four million, seven hundred thousand, seven hundred thirteen".