19966014 has 40 divisors (see below), whose sum is σ = 45961608. Its totient is φ = 6473520.

The previous prime is 19965997. The next prime is 19966021. The reversal of 19966014 is 41066991.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19966014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4329 + ... + 7659.

Almost surely, 2^19966014 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19966014, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22980804).

19966014 is an abundant number, since it is smaller than the sum of its proper divisors (25995594).

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

19966014 is a wasteful number, since it uses less digits than its factorization.

19966014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382 (or 3373 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 19966014 is about 4468.3345890835. The cubic root of 19966014 is about 271.2879208241.

The spelling of 19966014 in words is "nineteen million, nine hundred sixty-six thousand, fourteen".