19984973 has 8 divisors (see below), whose sum is σ = 20784000. Its totient is φ = 19193328.

The previous prime is 19984969. The next prime is 19985023. The reversal of 19984973 is 37948991.

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

It is a cyclic number.

It is not a de Polignac number, because 19984973 - 2² = 19984969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19984963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4040 + ... + 7502.

It is an arithmetic number, because the mean of its divisors is an integer number (2598000).

Almost surely, 2^19984973 is an apocalyptic number.

It is an amenable number.

19984973 is a deficient number, since it is larger than the sum of its proper divisors (799027).

19984973 is a wasteful number, since it uses less digits than its factorization.

19984973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691.

The product of its digits is 489888, while the sum is 50.

The square root of 19984973 is about 4470.4555696260. The cubic root of 19984973 is about 271.3737620369.

The spelling of 19984973 in words is "nineteen million, nine hundred eighty-four thousand, nine hundred seventy-three".