21739112 has 16 divisors (see below), whose sum is σ = 40840800. Its totient is φ = 10848240.

The previous prime is 21739103. The next prime is 21739129. The reversal of 21739112 is 21193712.

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 in 3 ways as a sum of consecutive naturals, for example, 2189 + ... + 6947.

It is an arithmetic number, because the mean of its divisors is an integer number (2552550).

Almost surely, 2^21739112 is an apocalyptic number.

It is an amenable number.

21739112 is a deficient number, since it is larger than the sum of its proper divisors (19101688).

21739112 is a wasteful number, since it uses less digits than its factorization.

21739112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5336 (or 5332 counting only the distinct ones).

The product of its digits is 756, while the sum is 26.

The square root of 21739112 is about 4662.5220642910. The cubic root of 21739112 is about 279.0919221098.

The spelling of 21739112 in words is "twenty-one million, seven hundred thirty-nine thousand, one hundred twelve".