21836966 has 8 divisors (see below), whose sum is σ = 34479480. Its totient is φ = 10343808.

The previous prime is 21836957. The next prime is 21836981. The reversal of 21836966 is 66963812.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287291 + ... + 287366.

It is an arithmetic number, because the mean of its divisors is an integer number (4309935).

Almost surely, 2^21836966 is an apocalyptic number.

21836966 is a deficient number, since it is larger than the sum of its proper divisors (12642514).

21836966 is a wasteful number, since it uses less digits than its factorization.

21836966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574678.

The product of its digits is 93312, while the sum is 41.

The square root of 21836966 is about 4673.0039589112. The cubic root of 21836966 is about 279.5100530497.

The spelling of 21836966 in words is "twenty-one million, eight hundred thirty-six thousand, nine hundred sixty-six".