21759112 has 16 divisors (see below), whose sum is σ = 40853340. Its totient is φ = 10864896.

The previous prime is 21759107. The next prime is 21759131. The reversal of 21759112 is 21195712.

It can be written as a sum of positive squares in 2 ways, for example, as 21473956 + 285156 = 4634^2 + 534^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6948 + ... + 9580.

Almost surely, 2^21759112 is an apocalyptic number.

It is an amenable number.

21759112 is a deficient number, since it is larger than the sum of its proper divisors (19094228).

21759112 is a wasteful number, since it uses less digits than its factorization.

21759112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672 (or 3668 counting only the distinct ones).

The product of its digits is 1260, while the sum is 28.

The square root of 21759112 is about 4664.6663331904. Note that the first 3 decimals coincide. The cubic root of 21759112 is about 279.1774841381.

The spelling of 21759112 in words is "twenty-one million, seven hundred fifty-nine thousand, one hundred twelve".