21826112 has 112 divisors (see below), whose sum is σ = 55790592. Its totient is φ = 8225280.

The previous prime is 21826109. The next prime is 21826127. The reversal of 21826112 is 21162812.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211853 + ... + 211955.

Almost surely, 2^21826112 is an apocalyptic number.

21826112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21826112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27895296).

21826112 is an abundant number, since it is smaller than the sum of its proper divisors (33964480).

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

21826112 is a wasteful number, since it uses less digits than its factorization.

21826112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 166 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

The square root of 21826112 is about 4671.8424630974. The cubic root of 21826112 is about 279.4637354904.

Adding to 21826112 its reverse (21162812), we get a palindrome (42988924).

The spelling of 21826112 in words is "twenty-one million, eight hundred twenty-six thousand, one hundred twelve".