21432305168532 has 192 divisors, whose sum is σ = 57217702348800. Its totient is φ = 6933493728000.

The previous prime is 21432305168471. The next prime is 21432305168543. The reversal of 21432305168532 is 23586150323412.

21432305168532 is a `hidden beast` number, since 2 + 1 + 4 + 3 + 2 + 3 + 0 + 51 + 68 + 532 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2607649519 + ... + 2607657737.

It is an arithmetic number, because the mean of its divisors is an integer number (298008866400).

Almost surely, 2^{21432305168532} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21432305168532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28608851174400).

21432305168532 is an abundant number, since it is smaller than the sum of its proper divisors (35785397180268).

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

21432305168532 is a wasteful number, since it uses less digits than its factorization.

21432305168532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11275 (or 11267 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 21432305168532 in words is "twenty-one trillion, four hundred thirty-two billion, three hundred five million, one hundred sixty-eight thousand, five hundred thirty-two".