19983984 has 20 divisors (see below), whose sum is σ = 51625416. Its totient is φ = 6661312.

The previous prime is 19983983. The next prime is 19983989. The reversal of 19983984 is 48938991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19983983) 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, 208119 + ... + 208214.

Almost surely, 2^19983984 is an apocalyptic number.

It is an amenable number.

19983984 is an abundant number, since it is smaller than the sum of its proper divisors (31641432).

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

19983984 is a wasteful number, since it uses less digits than its factorization.

19983984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416344 (or 416338 counting only the distinct ones).

The product of its digits is 559872, while the sum is 51.

The square root of 19983984 is about 4470.3449531328. The cubic root of 19983984 is about 271.3692854555.

The spelling of 19983984 in words is "nineteen million, nine hundred eighty-three thousand, nine hundred eighty-four".