19788093 has 12 divisors (see below), whose sum is σ = 30781660. Its totient is φ = 12177216.

The previous prime is 19788089. The next prime is 19788151. The reversal of 19788093 is 39088791.

It can be written as a sum of positive squares in 2 ways, for example, as 1996569 + 17791524 = 1413^2 + 4218^2 .

It is not a de Polignac number, because 19788093 - 2² = 19788089 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19788193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84448 + ... + 84681.

Almost surely, 2^19788093 is an apocalyptic number.

19788093 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19788093 is a deficient number, since it is larger than the sum of its proper divisors (10993567).

19788093 is a wasteful number, since it uses less digits than its factorization.

19788093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169148 (or 169145 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 19788093 is about 4448.3809414213. The cubic root of 19788093 is about 270.4796822707.

The spelling of 19788093 in words is "nineteen million, seven hundred eighty-eight thousand, ninety-three".