21668114 has 8 divisors (see below), whose sum is σ = 35002380. Its totient is φ = 10000656.

The previous prime is 21668111. The next prime is 21668123. The reversal of 21668114 is 41186612.

It can be written as a sum of positive squares in 2 ways, for example, as 21003889 + 664225 = 4583^2 + 815^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21668111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416669 + ... + 416720.

Almost surely, 2^21668114 is an apocalyptic number.

21668114 is a deficient number, since it is larger than the sum of its proper divisors (13334266).

21668114 is a wasteful number, since it uses less digits than its factorization.

21668114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833404.

The product of its digits is 2304, while the sum is 29.

The square root of 21668114 is about 4654.9021471992. The cubic root of 21668114 is about 278.7877609767.

The spelling of 21668114 in words is "twenty-one million, six hundred sixty-eight thousand, one hundred fourteen".