21530534300504 has 128 divisors (see below), whose sum is σ = 43095939840000. Its totient is φ = 10055032796160.

The previous prime is 21530534300503. The next prime is 21530534300533. The reversal of 21530534300504 is 40500343503512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21530534300501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12900259382 + ... + 12900261050.

It is an arithmetic number, because the mean of its divisors is an integer number (336687030000).

Almost surely, 2^{21530534300504} is an apocalyptic number.

It is an amenable number.

21530534300504 is an abundant number, since it is smaller than the sum of its proper divisors (21565405539496).

21530534300504 is a wasteful number, since it uses less digits than its factorization.

21530534300504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961 (or 3957 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 35.

The spelling of 21530534300504 in words is "twenty-one trillion, five hundred thirty billion, five hundred thirty-four million, three hundred thousand, five hundred four".