21332332 has 12 divisors (see below), whose sum is σ = 42664720. Its totient is φ = 9142416.

The previous prime is 21332329. The next prime is 21332347. The reversal of 21332332 is 23323312.

It is a happy number.

21332332 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380907 + ... + 380962.

Almost surely, 2^21332332 is an apocalyptic number.

It is an amenable number.

21332332 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21332332 is a wasteful number, since it uses less digits than its factorization.

21332332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761880 (or 761878 counting only the distinct ones).

The product of its digits is 648, while the sum is 19.

The square root of 21332332 is about 4618.6937547320. The cubic root of 21332332 is about 277.3401703864.

Adding to 21332332 its reverse (23323312), we get a palindrome (44655644).

It can be divided in two parts, 2133 and 2332, that added together give a triangular number (4465 = T₉₄).

The spelling of 21332332 in words is "twenty-one million, three hundred thirty-two thousand, three hundred thirty-two".