19885197 has 8 divisors (see below), whose sum is σ = 26757280. Its totient is φ = 13134960.

The previous prime is 19885193. The next prime is 19885199. The reversal of 19885197 is 79158891.

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

It is not a de Polignac number, because 19885197 - 2² = 19885193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19885193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30079 + ... + 30732.

It is an arithmetic number, because the mean of its divisors is an integer number (3344660).

Almost surely, 2^19885197 is an apocalyptic number.

It is an amenable number.

19885197 is a deficient number, since it is larger than the sum of its proper divisors (6872083).

19885197 is a wasteful number, since it uses less digits than its factorization.

19885197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60923.

The product of its digits is 181440, while the sum is 48.

The square root of 19885197 is about 4459.2821171126. The cubic root of 19885197 is about 270.9213925775.

The spelling of 19885197 in words is "nineteen million, eight hundred eighty-five thousand, one hundred ninety-seven".