21846966 has 16 divisors (see below), whose sum is σ = 43775424. Its totient is φ = 7268744.

The previous prime is 21846961. The next prime is 21846991. The reversal of 21846966 is 66964812.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21846961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421 + ... + 6623.

It is an arithmetic number, because the mean of its divisors is an integer number (2735964).

Almost surely, 2^21846966 is an apocalyptic number.

21846966 is an abundant number, since it is smaller than the sum of its proper divisors (21928458).

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

21846966 is a wasteful number, since it uses less digits than its factorization.

21846966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6795.

The product of its digits is 124416, while the sum is 42.

The square root of 21846966 is about 4674.0738119974. The cubic root of 21846966 is about 279.5527127301.

The spelling of 21846966 in words is "twenty-one million, eight hundred forty-six thousand, nine hundred sixty-six".