21832044 has 48 divisors (see below), whose sum is σ = 55154400. Its totient is φ = 6681600.

The previous prime is 21832009. The next prime is 21832051. The reversal of 21832044 is 44023812.

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 15 ways as a sum of consecutive naturals, for example, 54244 + ... + 54644.

It is an arithmetic number, because the mean of its divisors is an integer number (1149050).

Almost surely, 2^21832044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21832044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27577200).

21832044 is an abundant number, since it is smaller than the sum of its proper divisors (33322356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21832044 is a wasteful number, since it uses less digits than its factorization.

21832044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 21832044 is about 4672.4772872642. The cubic root of 21832044 is about 279.4890511721.

Adding to 21832044 its reverse (44023812), we get a palindrome (65855856).

The spelling of 21832044 in words is "twenty-one million, eight hundred thirty-two thousand, forty-four".