21534311333 has 8 divisors (see below), whose sum is σ = 23095389600. Its totient is φ = 20016002448.

The previous prime is 21534311221. The next prime is 21534311341. The reversal of 21534311333 is 33311343512.

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 21534311333 - 2¹⁰ = 21534310309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21534311296 and 21534311305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534311353) 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, 10691303 + ... + 10693316.

It is an arithmetic number, because the mean of its divisors is an integer number (2886923700).

Almost surely, 2^21534311333 is an apocalyptic number.

It is an amenable number.

21534311333 is a deficient number, since it is larger than the sum of its proper divisors (1561078267).

21534311333 is a wasteful number, since it uses less digits than its factorization.

21534311333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21384691.

The product of its digits is 9720, while the sum is 29.

Adding to 21534311333 its reverse (33311343512), we get a palindrome (54845654845).

The spelling of 21534311333 in words is "twenty-one billion, five hundred thirty-four million, three hundred eleven thousand, three hundred thirty-three".