21432143341552 has 20 divisors (see below), whose sum is σ = 41551277311936. Its totient is φ = 10709233067520.

The previous prime is 21432143341459. The next prime is 21432143341601. The reversal of 21432143341552 is 25514334123412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427386849 + ... + 427436992.

Almost surely, 2^{21432143341552} is an apocalyptic number.

It is an amenable number.

21432143341552 is a deficient number, since it is larger than the sum of its proper divisors (20119133970384).

21432143341552 is a wasteful number, since it uses less digits than its factorization.

21432143341552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854825416 (or 854825410 counting only the distinct ones).

The product of its digits is 345600, while the sum is 40.

Adding to 21432143341552 its reverse (25514334123412), we get a palindrome (46946477464964).

The spelling of 21432143341552 in words is "twenty-one trillion, four hundred thirty-two billion, one hundred forty-three million, three hundred forty-one thousand, five hundred fifty-two".