21134533 has 24 divisors (see below), whose sum is σ = 25855200. Its totient is φ = 17202528.

The previous prime is 21134527. The next prime is 21134569. The reversal of 21134533 is 33543112.

It is not a de Polignac number, because 21134533 - 2⁵ = 21134501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134513) 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, 151978 + ... + 152116.

It is an arithmetic number, because the mean of its divisors is an integer number (1077300).

Almost surely, 2^21134533 is an apocalyptic number.

It is an amenable number.

21134533 is a deficient number, since it is larger than the sum of its proper divisors (4720667).

21134533 is a wasteful number, since it uses less digits than its factorization.

21134533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 282 counting only the distinct ones).

The product of its digits is 1080, while the sum is 22.

The square root of 21134533 is about 4597.2310144260. The cubic root of 21134533 is about 276.4803169239.

Adding to 21134533 its reverse (33543112), we get a palindrome (54677645).

The spelling of 21134533 in words is "twenty-one million, one hundred thirty-four thousand, five hundred thirty-three".