21335032 has 16 divisors (see below), whose sum is σ = 40058640. Its totient is φ = 10652736.

The previous prime is 21335029. The next prime is 21335033. The reversal of 21335032 is 23053312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21335033) 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 3 ways as a sum of consecutive naturals, for example, 6508 + ... + 9220.

It is an arithmetic number, because the mean of its divisors is an integer number (2503665).

Almost surely, 2^21335032 is an apocalyptic number.

It is an amenable number.

21335032 is a deficient number, since it is larger than the sum of its proper divisors (18723608).

21335032 is a wasteful number, since it uses less digits than its factorization.

21335032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3702 (or 3698 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 21335032 is about 4618.9860359174. The cubic root of 21335032 is about 277.3518707304.

Adding to 21335032 its reverse (23053312), we get a palindrome (44388344).

It can be divided in two parts, 213 and 35032, that added together give a triangular number (35245 = T₂₆₅).

The spelling of 21335032 in words is "twenty-one million, three hundred thirty-five thousand, thirty-two".