21530541134316 has 48 divisors (see below), whose sum is σ = 50843986502400. Its totient is φ = 7090270103232.

The previous prime is 21530541134293. The next prime is 21530541134321. The reversal of 21530541134316 is 61343114503512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88441770 + ... + 88684878.

It is an arithmetic number, because the mean of its divisors is an integer number (1059249718800).

Almost surely, 2^{21530541134316} is an apocalyptic number.

It is an amenable number.

21530541134316 is an abundant number, since it is smaller than the sum of its proper divisors (29313445368084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21530541134316 is a wasteful number, since it uses less digits than its factorization.

21530541134316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332118 (or 332116 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

Adding to 21530541134316 its reverse (61343114503512), we get a palindrome (82873655637828).

The spelling of 21530541134316 in words is "twenty-one trillion, five hundred thirty billion, five hundred forty-one million, one hundred thirty-four thousand, three hundred sixteen".