19988793 has 12 divisors (see below), whose sum is σ = 31497648. Its totient is φ = 12114360.

The previous prime is 19988783. The next prime is 19988803. The reversal of 19988793 is 39788991.

It is an interprime number because it is at equal distance from previous prime (19988783) and next prime (19988803).

It is not a de Polignac number, because 19988793 - 2¹⁰ = 19987769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19988783) 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, 100855 + ... + 101052.

It is an arithmetic number, because the mean of its divisors is an integer number (2624804).

Almost surely, 2^19988793 is an apocalyptic number.

It is an amenable number.

19988793 is a deficient number, since it is larger than the sum of its proper divisors (11508855).

19988793 is a wasteful number, since it uses less digits than its factorization.

19988793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201924 (or 201921 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 19988793 is about 4470.8827987323. The cubic root of 19988793 is about 271.3910513894.

The spelling of 19988793 in words is "nineteen million, nine hundred eighty-eight thousand, seven hundred ninety-three".