21753112 has 8 divisors (see below), whose sum is σ = 40787100. Its totient is φ = 10876552.

The previous prime is 21753107. The next prime is 21753131. The reversal of 21753112 is 21135712.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1359562 + ... + 1359577.

Almost surely, 2^21753112 is an apocalyptic number.

It is an amenable number.

21753112 is a deficient number, since it is larger than the sum of its proper divisors (19033988).

21753112 is a wasteful number, since it uses less digits than its factorization.

21753112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2719145 (or 2719141 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 21753112 is about 4664.0231560317. The cubic root of 21753112 is about 279.1518210367.

Adding to 21753112 its reverse (21135712), we get a palindrome (42888824).

The spelling of 21753112 in words is "twenty-one million, seven hundred fifty-three thousand, one hundred twelve".