21833042 has 16 divisors (see below), whose sum is σ = 40830912. Its totient is φ = 8506320.

The previous prime is 21833041. The next prime is 21833047. The reversal of 21833042 is 24033812.

It is a junction number, because it is equal to n+sod(n) for n = 21832999 and 21833017.

It is not an unprimeable number, because it can be changed into a prime (21833041) 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, 70733 + ... + 71040.

It is an arithmetic number, because the mean of its divisors is an integer number (2551932).

Almost surely, 2^21833042 is an apocalyptic number.

21833042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21833042 is a deficient number, since it is larger than the sum of its proper divisors (18997870).

21833042 is a wasteful number, since it uses less digits than its factorization.

21833042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141793.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 21833042 is about 4672.5840816405. The cubic root of 21833042 is about 279.4933098331.

Adding to 21833042 its reverse (24033812), we get a palindrome (45866854).

It can be divided in two parts, 2183 and 3042, that added together give a palindrome (5225).

The spelling of 21833042 in words is "twenty-one million, eight hundred thirty-three thousand, forty-two".