21834022 has 8 divisors (see below), whose sum is σ = 37429776. Its totient is φ = 9357432.

The previous prime is 21834019. The next prime is 21834031. The reversal of 21834022 is 22043812.

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

It is a junction number, because it is equal to n+sod(n) for n = 21833984 and 21834002.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 779773 + ... + 779800.

It is an arithmetic number, because the mean of its divisors is an integer number (4678722).

Almost surely, 2^21834022 is an apocalyptic number.

21834022 is a deficient number, since it is larger than the sum of its proper divisors (15595754).

21834022 is a wasteful number, since it uses less digits than its factorization.

21834022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559582.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 21834022 is about 4672.6889474905. The cubic root of 21834022 is about 279.4974915583.

Adding to 21834022 its reverse (22043812), we get a palindrome (43877834).

The spelling of 21834022 in words is "twenty-one million, eight hundred thirty-four thousand, twenty-two".