21607112 has 16 divisors (see below), whose sum is σ = 41608860. Its totient is φ = 10511424.

The previous prime is 21607111. The next prime is 21607121. The reversal of 21607112 is 21170612.

It can be written as a sum of positive squares in 2 ways, for example, as 21215236 + 391876 = 4606^2 + 626^2 .

It is not an unprimeable number, because it can be changed into a prime (21607111) by changing a digit.

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, 36203 + ... + 36794.

Almost surely, 2^21607112 is an apocalyptic number.

It is an amenable number.

21607112 is a deficient number, since it is larger than the sum of its proper divisors (20001748).

21607112 is a wasteful number, since it uses less digits than its factorization.

21607112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73040 (or 73036 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 21607112 is about 4648.3450818544. The cubic root of 21607112 is about 278.5258923847.

Adding to 21607112 its reverse (21170612), we get a palindrome (42777724).

The spelling of 21607112 in words is "twenty-one million, six hundred seven thousand, one hundred twelve".