21452809716289 has 16 divisors (see below), whose sum is σ = 24810062175360. Its totient is φ = 18168983395200.

The previous prime is 21452809716281. The next prime is 21452809716329. The reversal of 21452809716289 is 98261790825412.

It is a cyclic number.

It is not a de Polignac number, because 21452809716289 - 2³ = 21452809716281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21452809716289.

It is not an unprimeable number, because it can be changed into a prime (21452809716281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10961874 + ... + 12769819.

It is an arithmetic number, because the mean of its divisors is an integer number (1550628885960).

Almost surely, 2^{21452809716289} is an apocalyptic number.

It is an amenable number.

21452809716289 is a deficient number, since it is larger than the sum of its proper divisors (3357252459071).

21452809716289 is a wasteful number, since it uses less digits than its factorization.

21452809716289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23733240.

The product of its (nonzero) digits is 34836480, while the sum is 64.

The spelling of 21452809716289 in words is "twenty-one trillion, four hundred fifty-two billion, eight hundred nine million, seven hundred sixteen thousand, two hundred eighty-nine".