19716648 has 32 divisors (see below), whose sum is σ = 56333760. Its totient is φ = 5633280.

The previous prime is 19716517. The next prime is 19716649. The reversal of 19716648 is 84661791.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (19716649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 58513 + ... + 58848.

It is an arithmetic number, because the mean of its divisors is an integer number (1760430).

Almost surely, 2^19716648 is an apocalyptic number.

It is an amenable number.

19716648 is an abundant number, since it is smaller than the sum of its proper divisors (36617112).

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

19716648 is a wasteful number, since it uses less digits than its factorization.

19716648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117377 (or 117373 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 19716648 is about 4440.3432299767. The cubic root of 19716648 is about 270.1537670073.

The spelling of 19716648 in words is "nineteen million, seven hundred sixteen thousand, six hundred forty-eight".