21168376 has 16 divisors (see below), whose sum is σ = 41059800. Its totient is φ = 10219104.

The previous prime is 21168373. The next prime is 21168391. The reversal of 21168376 is 67386112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21168373) 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, 45390 + ... + 45853.

Almost surely, 2^21168376 is an apocalyptic number.

It is an amenable number.

21168376 is a deficient number, since it is larger than the sum of its proper divisors (19891424).

21168376 is a wasteful number, since it uses less digits than its factorization.

21168376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91278 (or 91274 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 21168376 is about 4600.9103447035. The cubic root of 21168376 is about 276.6278153861.

The spelling of 21168376 in words is "twenty-one million, one hundred sixty-eight thousand, three hundred seventy-six".