21304351333 has 8 divisors (see below), whose sum is σ = 21806928000. Its totient is φ = 20802098688.

The previous prime is 21304351319. The next prime is 21304351351. The reversal of 21304351333 is 33315340312.

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 21304351333 - 2⁵ = 21304351301 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 (21304351303) 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, 54693 + ... + 213541.

It is an arithmetic number, because the mean of its divisors is an integer number (2725866000).

Almost surely, 2^21304351333 is an apocalyptic number.

It is an amenable number.

21304351333 is a deficient number, since it is larger than the sum of its proper divisors (502576667).

21304351333 is a wasteful number, since it uses less digits than its factorization.

21304351333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162011.

The product of its (nonzero) digits is 9720, while the sum is 28.

Adding to 21304351333 its reverse (33315340312), we get a palindrome (54619691645).

The spelling of 21304351333 in words is "twenty-one billion, three hundred four million, three hundred fifty-one thousand, three hundred thirty-three".