21432075811441 has 9 divisors (see below), whose sum is σ = 21707172410763. Its totient is φ = 21160422613200.

The previous prime is 21432075811427. The next prime is 21432075811451. The reversal of 21432075811441 is 14411857023412.

The square root of 21432075811441 is 4629479.

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

It can be written as a sum of positive squares in only one way, i.e., 9106640033841 + 12325435777600 = 3017721^2 + 3510760^2 .

It is not a de Polignac number, because 21432075811441 - 2⁷ = 21432075811313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21432075811451) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 365699541 + ... + 365758141.

Almost surely, 2^{21432075811441} is an apocalyptic number.

21432075811441 is the 4629479-th square number.

21432075811441 is the 2314740-th centered octagonal number.

It is an amenable number.

21432075811441 is a deficient number, since it is larger than the sum of its proper divisors (275096599322).

21432075811441 is an frugal number, since it uses more digits than its factorization.

21432075811441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117360 (or 58680 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 21432075811441 in words is "twenty-one trillion, four hundred thirty-two billion, seventy-five million, eight hundred eleven thousand, four hundred forty-one".