21168414 has 12 divisors (see below), whose sum is σ = 45864936. Its totient is φ = 7056132.

The previous prime is 21168409. The next prime is 21168439. The reversal of 21168414 is 41486112.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 587994 + ... + 588029.

It is an arithmetic number, because the mean of its divisors is an integer number (3822078).

Almost surely, 2^21168414 is an apocalyptic number.

21168414 is an abundant number, since it is smaller than the sum of its proper divisors (24696522).

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

21168414 is a wasteful number, since it uses less digits than its factorization.

21168414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176031 (or 1176028 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 21168414 is about 4600.9144743192. The cubic root of 21168414 is about 276.6279809137.

The spelling of 21168414 in words is "twenty-one million, one hundred sixty-eight thousand, four hundred fourteen".