21032830726613 has 2 divisors, whose sum is σ = 21032830726614. Its totient is φ = 21032830726612.

The previous prime is 21032830726529. The next prime is 21032830726723. The reversal of 21032830726613 is 31662703823012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14645676419089 + 6387154307524 = 3826967^2 + 2527282^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032830726613 - 2²⁰ = 21032829678037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21032830716613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516415363306 + 10516415363307.

It is an arithmetic number, because the mean of its divisors is an integer number (10516415363307).

Almost surely, 2^{21032830726613} is an apocalyptic number.

It is an amenable number.

21032830726613 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032830726613 is an equidigital number, since it uses as much as digits as its factorization.

21032830726613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 21032830726613 in words is "twenty-one trillion, thirty-two billion, eight hundred thirty million, seven hundred twenty-six thousand, six hundred thirteen".