19716672 has 56 divisors (see below), whose sum is σ = 52726336. Its totient is φ = 6501888.

The previous prime is 19716659. The next prime is 19716691. The reversal of 19716672 is 27661791.

It is a self number, because there is not a number n which added to its sum of digits gives 19716672.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19278 + ... + 20274.

Almost surely, 2^19716672 is an apocalyptic number.

19716672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19716672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26363168).

19716672 is an abundant number, since it is smaller than the sum of its proper divisors (33009664).

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

19716672 is a wasteful number, since it uses less digits than its factorization.

19716672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115 (or 1105 counting only the distinct ones).

The product of its digits is 31752, while the sum is 39.

The square root of 19716672 is about 4440.3459324697. The cubic root of 19716672 is about 270.1538766217.

The spelling of 19716672 in words is "nineteen million, seven hundred sixteen thousand, six hundred seventy-two".