21834533 has 4 divisors (see below), whose sum is σ = 24953760. Its totient is φ = 18715308.

The previous prime is 21834529. The next prime is 21834557. The reversal of 21834533 is 33543812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21834533 - 2² = 21834529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21834496 and 21834505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21834233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1559603 + ... + 1559616.

It is an arithmetic number, because the mean of its divisors is an integer number (6238440).

Almost surely, 2^21834533 is an apocalyptic number.

It is an amenable number.

21834533 is a deficient number, since it is larger than the sum of its proper divisors (3119227).

21834533 is an equidigital number, since it uses as much as digits as its factorization.

21834533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3119226.

The product of its digits is 8640, while the sum is 29.

The square root of 21834533 is about 4672.7436266074. The cubic root of 21834533 is about 279.4996719797.

The spelling of 21834533 in words is "twenty-one million, eight hundred thirty-four thousand, five hundred thirty-three".