19972984 has 16 divisors (see below), whose sum is σ = 38320920. Its totient is φ = 9754080.

The previous prime is 19972963. The next prime is 19972987. The reversal of 19972984 is 48927991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19972987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28687 + ... + 29374.

Almost surely, 2^19972984 is an apocalyptic number.

It is an amenable number.

19972984 is a deficient number, since it is larger than the sum of its proper divisors (18347936).

19972984 is a wasteful number, since it uses less digits than its factorization.

19972984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58110 (or 58106 counting only the distinct ones).

The product of its digits is 326592, while the sum is 49.

The square root of 19972984 is about 4469.1144536698. The cubic root of 19972984 is about 271.3194854088.

The spelling of 19972984 in words is "nineteen million, nine hundred seventy-two thousand, nine hundred eighty-four".