21835312 has 20 divisors (see below), whose sum is σ = 42474960. Its totient is φ = 10874048.

The previous prime is 21835309. The next prime is 21835321. The reversal of 21835312 is 21353812.

It is an unprimeable number.

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, 1614 + ... + 6802.

It is an arithmetic number, because the mean of its divisors is an integer number (2123748).

Almost surely, 2^21835312 is an apocalyptic number.

It is an amenable number.

21835312 is a deficient number, since it is larger than the sum of its proper divisors (20639648).

21835312 is a wasteful number, since it uses less digits than its factorization.

21835312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5460 (or 5454 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 21835312 is about 4672.8269816033. The cubic root of 21835312 is about 279.5029958834.

The spelling of 21835312 in words is "twenty-one million, eight hundred thirty-five thousand, three hundred twelve".