21533314033 has 24 divisors (see below), whose sum is σ = 27256743360. Its totient is φ = 16651034400.

The previous prime is 21533314009. The next prime is 21533314037. The reversal of 21533314033 is 33041333512.

It is not a de Polignac number, because 21533314033 - 2¹³ = 21533305841 is a prime.

It is a super-2 number, since 2×21533314033² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21533313992 and 21533314010.

It is not an unprimeable number, because it can be changed into a prime (21533314037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13923 + ... + 207991.

It is an arithmetic number, because the mean of its divisors is an integer number (1135697640).

Almost surely, 2^21533314033 is an apocalyptic number.

It is an amenable number.

21533314033 is a deficient number, since it is larger than the sum of its proper divisors (5723429327).

21533314033 is a wasteful number, since it uses less digits than its factorization.

21533314033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194229 (or 194218 counting only the distinct ones).

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

Adding to 21533314033 its reverse (33041333512), we get a palindrome (54574647545).

The spelling of 21533314033 in words is "twenty-one billion, five hundred thirty-three million, three hundred fourteen thousand, thirty-three".