19917085 has 8 divisors (see below), whose sum is σ = 24203520. Its totient is φ = 15731664.

The previous prime is 19917067. The next prime is 19917167. The reversal of 19917085 is 58071991.

It is a happy number.

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 19917085 - 2⁹ = 19916573 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, 24817 + ... + 25606.

It is an arithmetic number, because the mean of its divisors is an integer number (3025440).

Almost surely, 2^19917085 is an apocalyptic number.

It is an amenable number.

19917085 is a deficient number, since it is larger than the sum of its proper divisors (4286435).

19917085 is an equidigital number, since it uses as much as digits as its factorization.

19917085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50507.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 19917085 is about 4462.8561482530. The cubic root of 19917085 is about 271.0661321972.

The spelling of 19917085 in words is "nineteen million, nine hundred seventeen thousand, eighty-five".