21432134650161 has 8 divisors (see below), whose sum is σ = 28576337900320. Its totient is φ = 14288010583392.

The previous prime is 21432134650067. The next prime is 21432134650177. The reversal of 21432134650161 is 16105643123412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21432134650161 - 2⁷ = 21432134650033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21432134650361) 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 7 ways as a sum of consecutive naturals, for example, 19161391 + ... + 20249028.

It is an arithmetic number, because the mean of its divisors is an integer number (3572042237540).

Almost surely, 2^{21432134650161} is an apocalyptic number.

It is an amenable number.

21432134650161 is a deficient number, since it is larger than the sum of its proper divisors (7144203250159).

21432134650161 is a wasteful number, since it uses less digits than its factorization.

21432134650161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39591695.

The product of its (nonzero) digits is 103680, while the sum is 39.

Adding to 21432134650161 its reverse (16105643123412), we get a palindrome (37537777773573).

The spelling of 21432134650161 in words is "twenty-one trillion, four hundred thirty-two billion, one hundred thirty-four million, six hundred fifty thousand, one hundred sixty-one".