19719044 has 12 divisors (see below), whose sum is σ = 34637568. Its totient is φ = 9822600.

The previous prime is 19719013. The next prime is 19719047. The reversal of 19719044 is 44091791.

It is a junction number, because it is equal to n+sod(n) for n = 19718995 and 19719013.

It is not an unprimeable number, because it can be changed into a prime (19719047) 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, 8012 + ... + 10179.

It is an arithmetic number, because the mean of its divisors is an integer number (2886464).

Almost surely, 2^19719044 is an apocalyptic number.

It is an amenable number.

19719044 is a deficient number, since it is larger than the sum of its proper divisors (14918524).

19719044 is a wasteful number, since it uses less digits than its factorization.

19719044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18466 (or 18464 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 19719044 is about 4440.6130207439. The cubic root of 19719044 is about 270.1647097430.

The spelling of 19719044 in words is "nineteen million, seven hundred nineteen thousand, forty-four".