21966014 has 48 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 8694000.

The previous prime is 21965987. The next prime is 21966019. The reversal of 21966014 is 41066912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21966019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87389 + ... + 87639.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^21966014 is an apocalyptic number.

21966014 is a deficient number, since it is larger than the sum of its proper divisors (19402306).

21966014 is a wasteful number, since it uses less digits than its factorization.

21966014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 21966014 is about 4686.7914397805. The cubic root of 21966014 is about 280.0595706586.

The spelling of 21966014 in words is "twenty-one million, nine hundred sixty-six thousand, fourteen".