21512530324344 has 16 divisors (see below), whose sum is σ = 53781325810920. Its totient is φ = 7170843441440.

The previous prime is 21512530324343. The next prime is 21512530324349. The reversal of 21512530324344 is 44342303521512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21512530324343) 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 3 ways as a sum of consecutive naturals, for example, 448177715067 + ... + 448177715114.

Almost surely, 2^{21512530324344} is an apocalyptic number.

21512530324344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21512530324344 is an abundant number, since it is smaller than the sum of its proper divisors (32268795486576).

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

21512530324344 is a wasteful number, since it uses less digits than its factorization.

21512530324344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896355430190 (or 896355430186 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 21512530324344 its reverse (44342303521512), we get a palindrome (65854833845856).

The spelling of 21512530324344 in words is "twenty-one trillion, five hundred twelve billion, five hundred thirty million, three hundred twenty-four thousand, three hundred forty-four".