21033020351432 has 64 divisors (see below), whose sum is σ = 41882391144000. Its totient is φ = 9874255878144.

The previous prime is 21033020351423. The next prime is 21033020351503. The reversal of 21033020351432 is 23415302033012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21033020351395 and 21033020351404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457425419 + ... + 457471397.

It is an arithmetic number, because the mean of its divisors is an integer number (654412361625).

Almost surely, 2^{21033020351432} is an apocalyptic number.

It is an amenable number.

21033020351432 is a deficient number, since it is larger than the sum of its proper divisors (20849370792568).

21033020351432 is a wasteful number, since it uses less digits than its factorization.

21033020351432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72750 (or 72746 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 21033020351432 its reverse (23415302033012), we get a palindrome (44448322384444).

The spelling of 21033020351432 in words is "twenty-one trillion, thirty-three billion, twenty million, three hundred fifty-one thousand, four hundred thirty-two".