21343332 has 12 divisors (see below), whose sum is σ = 49801136. Its totient is φ = 7114440.

The previous prime is 21343331. The next prime is 21343337. The reversal of 21343332 is 23334312.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is a junction number, because it is equal to n+sod(n) for n = 21343299 and 21343308.

It is not an unprimeable number, because it can be changed into a prime (21343331) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 889294 + ... + 889317.

Almost surely, 2^21343332 is an apocalyptic number.

It is an amenable number.

21343332 is an abundant number, since it is smaller than the sum of its proper divisors (28457804).

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

21343332 is a wasteful number, since it uses less digits than its factorization.

21343332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778618 (or 1778616 counting only the distinct ones).

The product of its digits is 1296, while the sum is 21.

The square root of 21343332 is about 4619.8844141385. The cubic root of 21343332 is about 277.3878322744.

Subtracting from 21343332 its sum of digits (21), we obtain a triangular number (21343311 = T₆₅₃₃).

Adding to 21343332 its reverse (23334312), we get a palindrome (44677644).

The spelling of 21343332 in words is "twenty-one million, three hundred forty-three thousand, three hundred thirty-two".