21176968 has 32 divisors (see below), whose sum is σ = 43407360. Its totient is φ = 9642240.

The previous prime is 21176959. The next prime is 21176993. The reversal of 21176968 is 86967112.

It is a self number, because there is not a number n which added to its sum of digits gives 21176968.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1705 + ... + 6727.

It is an arithmetic number, because the mean of its divisors is an integer number (1356480).

Almost surely, 2^21176968 is an apocalyptic number.

It is an amenable number.

21176968 is an abundant number, since it is smaller than the sum of its proper divisors (22230392).

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

21176968 is a wasteful number, since it uses less digits than its factorization.

21176968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077 (or 5073 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 21176968 is about 4601.8439782331. The cubic root of 21176968 is about 276.6652370049.

The spelling of 21176968 in words is "twenty-one million, one hundred seventy-six thousand, nine hundred sixty-eight".