21328905583 has 8 divisors (see below), whose sum is σ = 22476610656. Its totient is φ = 20199564000.

The previous prime is 21328905581. The next prime is 21328905599. The reversal of 21328905583 is 38550982312.

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 21328905583 - 2¹ = 21328905581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21328905581) 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, 4588488 + ... + 4593133.

It is an arithmetic number, because the mean of its divisors is an integer number (2809576332).

Almost surely, 2^21328905583 is an apocalyptic number.

21328905583 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21328905583 is a deficient number, since it is larger than the sum of its proper divisors (1147705073).

21328905583 is a wasteful number, since it uses less digits than its factorization.

21328905583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9181745.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 21328905583 in words is "twenty-one billion, three hundred twenty-eight million, nine hundred five thousand, five hundred eighty-three".