19864672 has 12 divisors (see below), whose sum is σ = 39108636. Its totient is φ = 9932320.

The previous prime is 19864661. The next prime is 19864673. The reversal of 19864672 is 27646891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19864673) 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 as a sum of consecutive naturals, namely, 310354 + ... + 310417.

It is an arithmetic number, because the mean of its divisors is an integer number (3259053).

Almost surely, 2^19864672 is an apocalyptic number.

It is an amenable number.

19864672 is a deficient number, since it is larger than the sum of its proper divisors (19243964).

19864672 is an equidigital number, since it uses as much as digits as its factorization.

19864672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620781 (or 620773 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 19864672 is about 4456.9801435501. The cubic root of 19864672 is about 270.8281477403.

The spelling of 19864672 in words is "nineteen million, eight hundred sixty-four thousand, six hundred seventy-two".