21822134 has 16 divisors (see below), whose sum is σ = 33384960. Its totient is φ = 10695720.

The previous prime is 21822133. The next prime is 21822139. The reversal of 21822134 is 43122812.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21822131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33617 + ... + 34259.

It is an arithmetic number, because the mean of its divisors is an integer number (2086560).

Almost surely, 2^21822134 is an apocalyptic number.

21822134 is a deficient number, since it is larger than the sum of its proper divisors (11562826).

21822134 is a wasteful number, since it uses less digits than its factorization.

21822134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955.

The product of its digits is 768, while the sum is 23.

The square root of 21822134 is about 4671.4167016013. The cubic root of 21822134 is about 279.4467562213.

Adding to 21822134 its reverse (43122812), we get a palindrome (64944946).

The spelling of 21822134 in words is "twenty-one million, eight hundred twenty-two thousand, one hundred thirty-four".