19888005 has 8 divisors (see below), whose sum is σ = 31820832. Its totient is φ = 10606928.

The previous prime is 19887979. The next prime is 19888021. The reversal of 19888005 is 50088891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19888005 - 2⁶ = 19887941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662919 + ... + 662948.

It is an arithmetic number, because the mean of its divisors is an integer number (3977604).

Almost surely, 2^19888005 is an apocalyptic number.

19888005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19888005 is a deficient number, since it is larger than the sum of its proper divisors (11932827).

19888005 is a wasteful number, since it uses less digits than its factorization.

19888005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325875.

The product of its (nonzero) digits is 23040, while the sum is 39.

The square root of 19888005 is about 4459.5969548828. The cubic root of 19888005 is about 270.9341442987.

The spelling of 19888005 in words is "nineteen million, eight hundred eighty-eight thousand, five".