21530302476713 has 4 divisors (see below), whose sum is σ = 21530630933328. Its totient is φ = 21529974020100.

The previous prime is 21530302476667. The next prime is 21530302476719. The reversal of 21530302476713 is 31767420303512.

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 21530302476713 - 2⁸ = 21530302476457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21530302476719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164129963 + ... + 164261088.

It is an arithmetic number, because the mean of its divisors is an integer number (5382657733332).

Almost surely, 2^{21530302476713} is an apocalyptic number.

It is an amenable number.

21530302476713 is a deficient number, since it is larger than the sum of its proper divisors (328456615).

21530302476713 is an equidigital number, since it uses as much as digits as its factorization.

21530302476713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328456614.

The product of its (nonzero) digits is 635040, while the sum is 44.

The spelling of 21530302476713 in words is "twenty-one trillion, five hundred thirty billion, three hundred two million, four hundred seventy-six thousand, seven hundred thirteen".