19984128 has 36 divisors (see below), whose sum is σ = 53188968. Its totient is φ = 6661120.

The previous prime is 19984123. The next prime is 19984147. The reversal of 19984128 is 82148991.

It is a self number, because there is not a number n which added to its sum of digits gives 19984128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19984123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12243 + ... + 13778.

Almost surely, 2^19984128 is an apocalyptic number.

It is an amenable number.

19984128 is an abundant number, since it is smaller than the sum of its proper divisors (33204840).

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

19984128 is an equidigital number, since it uses as much as digits as its factorization.

19984128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26040 (or 26026 counting only the distinct ones).

The product of its digits is 41472, while the sum is 42.

The square root of 19984128 is about 4470.3610592434. The cubic root of 19984128 is about 271.3699372622.

The spelling of 19984128 in words is "nineteen million, nine hundred eighty-four thousand, one hundred twenty-eight".