19730224 has 20 divisors (see below), whose sum is σ = 39042144. Its totient is φ = 9654848.

The previous prime is 19730209. The next prime is 19730231. The reversal of 19730224 is 42203791.

It is a junction number, because it is equal to n+sod(n) for n = 19730192 and 19730201.

It is an unprimeable number.

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, 12367 + ... + 13870.

Almost surely, 2^19730224 is an apocalyptic number.

It is an amenable number.

19730224 is a deficient number, since it is larger than the sum of its proper divisors (19311920).

19730224 is a wasteful number, since it uses less digits than its factorization.

19730224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26292 (or 26286 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 19730224 is about 4441.8716775702. The cubic root of 19730224 is about 270.2157580394.

The spelling of 19730224 in words is "nineteen million, seven hundred thirty thousand, two hundred twenty-four".