21341009054689 has 9 divisors (see below), whose sum is σ = 21393770368089. Its totient is φ = 21288377575920.

The previous prime is 21341009054641. The next prime is 21341009054693. The reversal of 21341009054689 is 98645090014312.

The square root of 21341009054689 is 4619633.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7879389350625 + 13461619704064 = 2807025^2 + 3669008^2 .

It is not a de Polignac number, because 21341009054689 - 2³⁵ = 21306649316321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21341009057689) 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 8 ways as a sum of consecutive naturals, for example, 1944860007 + ... + 1944870979.

Almost surely, 2^{21341009054689} is an apocalyptic number.

21341009054689 is the 4619633-rd square number.

21341009054689 is the 2309817-th centered octagonal number.

It is an amenable number.

21341009054689 is a deficient number, since it is larger than the sum of its proper divisors (52761313400).

21341009054689 is an frugal number, since it uses more digits than its factorization.

21341009054689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22788 (or 11394 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 21341009054689 in words is "twenty-one trillion, three hundred forty-one billion, nine million, fifty-four thousand, six hundred eighty-nine".