21934533 has 8 divisors (see below), whose sum is σ = 29289600. Its totient is φ = 14601248.

The previous prime is 21934501. The next prime is 21934537. The reversal of 21934533 is 33543912.

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 21934533 - 2⁵ = 21934501 is a prime.

It is a super-2 number, since 2×21934533² = 962247475856178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21934533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21934537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2928 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (3661200).

Almost surely, 2^21934533 is an apocalyptic number.

It is an amenable number.

21934533 is a deficient number, since it is larger than the sum of its proper divisors (7355067).

21934533 is a wasteful number, since it uses less digits than its factorization.

21934533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10891.

The product of its digits is 9720, while the sum is 30.

The square root of 21934533 is about 4683.4317546005. The cubic root of 21934533 is about 279.9257158383.

The spelling of 21934533 in words is "twenty-one million, nine hundred thirty-four thousand, five hundred thirty-three".