21606114 has 8 divisors (see below), whose sum is σ = 43212240. Its totient is φ = 7202036.

The previous prime is 21606083. The next prime is 21606119. The reversal of 21606114 is 41160612.

It is a sphenic number, since it is the product of 3 distinct primes.

21606114 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21606119) by changing a digit.

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, 1800504 + ... + 1800515.

It is an arithmetic number, because the mean of its divisors is an integer number (5401530).

Almost surely, 2^21606114 is an apocalyptic number.

21606114 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21606114 is a wasteful number, since it uses less digits than its factorization.

21606114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601024.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 21606114 is about 4648.2377305813. The cubic root of 21606114 is about 278.5216040880.

Adding to 21606114 its reverse (41160612), we get a palindrome (62766726).

The spelling of 21606114 in words is "twenty-one million, six hundred six thousand, one hundred fourteen".