21035132 has 24 divisors (see below), whose sum is σ = 38525760. Its totient is φ = 10039040.

The previous prime is 21035123. The next prime is 21035149. The reversal of 21035132 is 23153012.

It is a self number, because there is not a number n which added to its sum of digits gives 21035132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6344 + ... + 9072.

It is an arithmetic number, because the mean of its divisors is an integer number (1605240).

Almost surely, 2^21035132 is an apocalyptic number.

It is an amenable number.

21035132 is a deficient number, since it is larger than the sum of its proper divisors (17490628).

21035132 is a wasteful number, since it uses less digits than its factorization.

21035132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821 (or 2819 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 21035132 is about 4586.4073085586. The cubic root of 21035132 is about 276.0461835479.

Adding to 21035132 its reverse (23153012), we get a palindrome (44188144).

The spelling of 21035132 in words is "twenty-one million, thirty-five thousand, one hundred thirty-two".