21530541134304 has 72 divisors (see below), whose sum is σ = 62066208964032. Its totient is φ = 7078534064640.

The previous prime is 21530541134293. The next prime is 21530541134321. The reversal of 21530541134304 is 40343114503512.

21530541134304 is a `hidden beast` number, since 2 + 1 + 5 + 305 + 4 + 1 + 1 + 343 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 512025712 + ... + 512067759.

It is an arithmetic number, because the mean of its divisors is an integer number (862030680056).

Almost surely, 2^{21530541134304} is an apocalyptic number.

21530541134304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21530541134304 is an abundant number, since it is smaller than the sum of its proper divisors (40535667829728).

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

21530541134304 is a wasteful number, since it uses less digits than its factorization.

21530541134304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024093560 (or 1024093549 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 21530541134304 its reverse (40343114503512), we get a palindrome (61873655637816).

The spelling of 21530541134304 in words is "twenty-one trillion, five hundred thirty billion, five hundred forty-one million, one hundred thirty-four thousand, three hundred four".