21432241143 has 16 divisors (see below), whose sum is σ = 31760924160. Its totient is φ = 14283905688.

The previous prime is 21432241141. The next prime is 21432241147. The reversal of 21432241143 is 34114223412.

21432241143 is a `hidden beast` number, since 214 + 32 + 2 + 411 + 4 + 3 = 666.

It is not a de Polignac number, because 21432241143 - 2¹ = 21432241141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432241141) 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 15 ways as a sum of consecutive naturals, for example, 24505 + ... + 208482.

It is an arithmetic number, because the mean of its divisors is an integer number (1985057760).

Almost surely, 2^21432241143 is an apocalyptic number.

21432241143 is a deficient number, since it is larger than the sum of its proper divisors (10328683017).

21432241143 is a wasteful number, since it uses less digits than its factorization.

21432241143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236403 (or 236397 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 21432241143 its reverse (34114223412), we get a palindrome (55546464555).

The spelling of 21432241143 in words is "twenty-one billion, four hundred thirty-two million, two hundred forty-one thousand, one hundred forty-three".