21072933289 has 8 divisors (see below), whose sum is σ = 21354624000. Its totient is φ = 20791616352.

The previous prime is 21072933239. The next prime is 21072933311. The reversal of 21072933289 is 98233927012.

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 21072933289 - 2¹¹ = 21072931241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21072933229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20997 + ... + 206365.

It is an arithmetic number, because the mean of its divisors is an integer number (2669328000).

Almost surely, 2^21072933289 is an apocalyptic number.

It is an amenable number.

21072933289 is a deficient number, since it is larger than the sum of its proper divisors (281690711).

21072933289 is a wasteful number, since it uses less digits than its factorization.

21072933289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186887.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 21072933289 in words is "twenty-one billion, seventy-two million, nine hundred thirty-three thousand, two hundred eighty-nine".