19984069 has 8 divisors (see below), whose sum is σ = 23053248. Its totient is φ = 16968480.

The previous prime is 19984051. The next prime is 19984073. The reversal of 19984069 is 96048991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19984069 is a prime.

It is a super-2 number, since 2×19984069² = 798726027593522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19984039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12592 + ... + 14089.

It is an arithmetic number, because the mean of its divisors is an integer number (2881656).

Almost surely, 2^19984069 is an apocalyptic number.

It is an amenable number.

19984069 is a deficient number, since it is larger than the sum of its proper divisors (3069179).

19984069 is a wasteful number, since it uses less digits than its factorization.

19984069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26795.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 19984069 is about 4470.3544602190. The cubic root of 19984069 is about 271.3696702029.

The spelling of 19984069 in words is "nineteen million, nine hundred eighty-four thousand, sixty-nine".