19984872 has 16 divisors (see below), whose sum is σ = 49962240. Its totient is φ = 6661616.

The previous prime is 19984859. The next prime is 19984873. The reversal of 19984872 is 27848991.

It is not an unprimeable number, because it can be changed into a prime (19984873) 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, 416328 + ... + 416375.

It is an arithmetic number, because the mean of its divisors is an integer number (3122640).

Almost surely, 2^19984872 is an apocalyptic number.

19984872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19984872 is an abundant number, since it is smaller than the sum of its proper divisors (29977368).

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

19984872 is a wasteful number, since it uses less digits than its factorization.

19984872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832712 (or 832708 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 19984872 is about 4470.4442732239. Note that the first 3 decimals coincide. The cubic root of 19984872 is about 271.3733048802.

The spelling of 19984872 in words is "nineteen million, nine hundred eighty-four thousand, eight hundred seventy-two".