19964716 has 12 divisors (see below), whose sum is σ = 34970488. Its totient is φ = 9973152.

The previous prime is 19964701. The next prime is 19964723. The reversal of 19964716 is 61746991.

It is a happy number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 5560 + ... + 8416.

Almost surely, 2^19964716 is an apocalyptic number.

It is an amenable number.

19964716 is a deficient number, since it is larger than the sum of its proper divisors (15005772).

19964716 is a wasteful number, since it uses less digits than its factorization.

19964716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608 (or 4606 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The square root of 19964716 is about 4468.1893424518. The cubic root of 19964716 is about 271.2820418448.

The spelling of 19964716 in words is "nineteen million, nine hundred sixty-four thousand, seven hundred sixteen".