21834033 has 16 divisors (see below), whose sum is σ = 32200896. Its totient is φ = 13072320.

The previous prime is 21834031. The next prime is 21834037. The reversal of 21834033 is 33043812.

It is not a de Polignac number, because 21834033 - 2¹ = 21834031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21833994 and 21834012.

It is not an unprimeable number, because it can be changed into a prime (21834031) 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 15 ways as a sum of consecutive naturals, for example, 6123 + ... + 9008.

It is an arithmetic number, because the mean of its divisors is an integer number (2012556).

Almost surely, 2^21834033 is an apocalyptic number.

It is an amenable number.

21834033 is a deficient number, since it is larger than the sum of its proper divisors (10366863).

21834033 is a wasteful number, since it uses less digits than its factorization.

21834033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15184.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 21834033 is about 4672.6901245428. The cubic root of 21834033 is about 279.4975384953.

Adding to 21834033 its reverse (33043812), we get a palindrome (54877845).

It can be divided in two parts, 2183 and 4033, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 21834033 in words is "twenty-one million, eight hundred thirty-four thousand, thirty-three".