21034533 has 8 divisors (see below), whose sum is σ = 30203488. Its totient is φ = 12944304.

The previous prime is 21034513. The next prime is 21034543. The reversal of 21034533 is 33543012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21034533 - 2¹⁴ = 21018149 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 (21034513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269635 + ... + 269712.

It is an arithmetic number, because the mean of its divisors is an integer number (3775436).

Almost surely, 2^21034533 is an apocalyptic number.

It is an amenable number.

21034533 is a deficient number, since it is larger than the sum of its proper divisors (9168955).

21034533 is a wasteful number, since it uses less digits than its factorization.

21034533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539363.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 21034533 is about 4586.3420064361. The cubic root of 21034533 is about 276.0435632770.

Adding to 21034533 its reverse (33543012), we get a palindrome (54577545).

It can be divided in two parts, 210 and 34533, that added together give a palindrome (34743).

The spelling of 21034533 in words is "twenty-one million, thirty-four thousand, five hundred thirty-three".