21330573789 has 8 divisors (see below), whose sum is σ = 32503731520. Its totient is φ = 12188899296.

The previous prime is 21330573743. The next prime is 21330573809. The reversal of 21330573789 is 98737503312.

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

It is not a de Polignac number, because 21330573789 - 2⁷ = 21330573661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330572789) 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, 507870784 + ... + 507870825.

It is an arithmetic number, because the mean of its divisors is an integer number (4062966440).

Almost surely, 2^21330573789 is an apocalyptic number.

It is an amenable number.

21330573789 is a deficient number, since it is larger than the sum of its proper divisors (11173157731).

21330573789 is a wasteful number, since it uses less digits than its factorization.

21330573789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015741619.

The product of its (nonzero) digits is 952560, while the sum is 48.

The spelling of 21330573789 in words is "twenty-one billion, three hundred thirty million, five hundred seventy-three thousand, seven hundred eighty-nine".