21432040143143 has 8 divisors (see below), whose sum is σ = 25782905435520. Its totient is φ = 17403461168760.

The previous prime is 21432040143127. The next prime is 21432040143149. The reversal of 21432040143143 is 34134104023412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21432040143143 - 2⁴ = 21432040143127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432040143149) 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 7 ways as a sum of consecutive naturals, for example, 80571579353 + ... + 80571579618.

It is an arithmetic number, because the mean of its divisors is an integer number (3222863179440).

Almost surely, 2^{21432040143143} is an apocalyptic number.

21432040143143 is a deficient number, since it is larger than the sum of its proper divisors (4350865292377).

21432040143143 is a wasteful number, since it uses less digits than its factorization.

21432040143143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161143158997.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21432040143143 its reverse (34134104023412), we get a palindrome (55566144166555).

The spelling of 21432040143143 in words is "twenty-one trillion, four hundred thirty-two billion, forty million, one hundred forty-three thousand, one hundred forty-three".