19919084 has 12 divisors (see below), whose sum is σ = 34959624. Its totient is φ = 9930624.

The previous prime is 19919083. The next prime is 19919093. The reversal of 19919084 is 48091991.

It is not an unprimeable number, because it can be changed into a prime (19919083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5642 + ... + 8465.

It is an arithmetic number, because the mean of its divisors is an integer number (2913302).

Almost surely, 2^19919084 is an apocalyptic number.

It is an amenable number.

19919084 is a deficient number, since it is larger than the sum of its proper divisors (15040540).

19919084 is a wasteful number, since it uses less digits than its factorization.

19919084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14464 (or 14462 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 19919084 is about 4463.0801023508. The cubic root of 19919084 is about 271.0752005100.

The spelling of 19919084 in words is "nineteen million, nine hundred nineteen thousand, eighty-four".