21344112 has 60 divisors (see below), whose sum is σ = 63254880. Its totient is φ = 6695424.

The previous prime is 21344093. The next prime is 21344117. The reversal of 21344112 is 21144312.

21344112 is a `hidden beast` number, since 213 + 441 + 12 = 666.

It is a super-2 number, since 2×21344112² = 911142234137088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1912 + ... + 6807.

It is an arithmetic number, because the mean of its divisors is an integer number (1054248).

Almost surely, 2^21344112 is an apocalyptic number.

It is an amenable number.

21344112 is an abundant number, since it is smaller than the sum of its proper divisors (41910768).

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

21344112 is a wasteful number, since it uses less digits than its factorization.

21344112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8750 (or 8741 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 21344112 is about 4619.9688310637. The cubic root of 21344112 is about 277.3912113137.

Adding to 21344112 its reverse (21144312), we get a palindrome (42488424).

The spelling of 21344112 in words is "twenty-one million, three hundred forty-four thousand, one hundred twelve".