21543304301332 has 48 divisors (see below), whose sum is σ = 43551683320320. Its totient is φ = 9215486259200.

The previous prime is 21543304301327. The next prime is 21543304301359. The reversal of 21543304301332 is 23310340334512.

It is a super-2 number, since 2×21543304301332² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

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, 6280644 + ... + 9084772.

It is an arithmetic number, because the mean of its divisors is an integer number (907326735840).

Almost surely, 2^{21543304301332} is an apocalyptic number.

21543304301332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21543304301332 is an abundant number, since it is smaller than the sum of its proper divisors (22008379018988).

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

21543304301332 is a wasteful number, since it uses less digits than its factorization.

21543304301332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814432 (or 2814430 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 34.

Adding to 21543304301332 its reverse (23310340334512), we get a palindrome (44853644635844).

The spelling of 21543304301332 in words is "twenty-one trillion, five hundred forty-three billion, three hundred four million, three hundred one thousand, three hundred thirty-two".