21432235003252 has 48 divisors (see below), whose sum is σ = 37688081032000. Its totient is φ = 10664377574400.

The previous prime is 21432235003199. The next prime is 21432235003253. The reversal of 21432235003252 is 25230053223412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432235003253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1038322852 + ... + 1038343492.

Almost surely, 2^{21432235003252} is an apocalyptic number.

It is an amenable number.

21432235003252 is a deficient number, since it is larger than the sum of its proper divisors (16255846028748).

21432235003252 is a wasteful number, since it uses less digits than its factorization.

21432235003252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22592 (or 22590 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 21432235003252 its reverse (25230053223412), we get a palindrome (46662288226664).

The spelling of 21432235003252 in words is "twenty-one trillion, four hundred thirty-two billion, two hundred thirty-five million, three thousand, two hundred fifty-two".