21632321823543 has 12 divisors (see below), whose sum is σ = 31282316151528. Its totient is φ = 14405103694800.

The previous prime is 21632321823529. The next prime is 21632321823551. The reversal of 21632321823543 is 34532812323612.

21632321823543 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 2 + 3 + 21 + 82 + 3 + 543 = 666.

It is not a de Polignac number, because 21632321823543 - 2²² = 21632317629239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632321823643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1370340633 + ... + 1370356418.

It is an arithmetic number, because the mean of its divisors is an integer number (2606859679294).

Almost surely, 2^{21632321823543} is an apocalyptic number.

21632321823543 is a deficient number, since it is larger than the sum of its proper divisors (9649994327985).

21632321823543 is a wasteful number, since it uses less digits than its factorization.

21632321823543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740697934 (or 2740697931 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The spelling of 21632321823543 in words is "twenty-one trillion, six hundred thirty-two billion, three hundred twenty-one million, eight hundred twenty-three thousand, five hundred forty-three".