21035632 has 20 divisors (see below), whose sum is σ = 40828240. Its totient is φ = 10499328.

The previous prime is 21035629. The next prime is 21035633. The reversal of 21035632 is 23653012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035633) 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, 15493 + ... + 16795.

It is an arithmetic number, because the mean of its divisors is an integer number (2041412).

Almost surely, 2^21035632 is an apocalyptic number.

It is an amenable number.

21035632 is a deficient number, since it is larger than the sum of its proper divisors (19792608).

21035632 is a wasteful number, since it uses less digits than its factorization.

21035632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320 (or 2314 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 21035632 is about 4586.4618171309. The cubic root of 21035632 is about 276.0483707143.

Adding to 21035632 its reverse (23653012), we get a palindrome (44688644).

The spelling of 21035632 in words is "twenty-one million, thirty-five thousand, six hundred thirty-two".