19904845424 has 20 divisors (see below), whose sum is σ = 38963224944. Its totient is φ = 9849819648.

The previous prime is 19904845421. The next prime is 19904845439. The reversal of 19904845424 is 42454840991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19904845421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6411092 + ... + 6414195.

Almost surely, 2^19904845424 is an apocalyptic number.

It is an amenable number.

19904845424 is a deficient number, since it is larger than the sum of its proper divisors (19058379520).

19904845424 is a wasteful number, since it uses less digits than its factorization.

19904845424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12825392 (or 12825386 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 19904845424 in words is "nineteen billion, nine hundred four million, eight hundred forty-five thousand, four hundred twenty-four".