21411312 has 40 divisors (see below), whose sum is σ = 59569104. Its totient is φ = 6587904.

The previous prime is 21411301. The next prime is 21411317. The reversal of 21411312 is 21311412.

It is a super-2 number, since 2×21411312² = 916888563122688, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21411291 and 21411300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411317) 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 7 ways as a sum of consecutive naturals, for example, 16533 + ... + 17780.

Almost surely, 2^21411312 is an apocalyptic number.

It is an amenable number.

21411312 is an abundant number, since it is smaller than the sum of its proper divisors (38157792).

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

21411312 is a wasteful number, since it uses less digits than its factorization.

21411312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34337 (or 34331 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 21411312 is about 4627.2358919770. The cubic root of 21411312 is about 277.6820200186.

Adding to 21411312 its reverse (21311412), we get a palindrome (42722724).

The spelling of 21411312 in words is "twenty-one million, four hundred eleven thousand, three hundred twelve".