19897196 has 24 divisors (see below), whose sum is σ = 38419920. Its totient is φ = 8940800.

The previous prime is 19897193. The next prime is 19897223. The reversal of 19897196 is 69179891.

It is not an unprimeable number, because it can be changed into a prime (19897193) 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, 1376 + ... + 6456.

It is an arithmetic number, because the mean of its divisors is an integer number (1600830).

Almost surely, 2^19897196 is an apocalyptic number.

It is an amenable number.

19897196 is a deficient number, since it is larger than the sum of its proper divisors (18522724).

19897196 is a wasteful number, since it uses less digits than its factorization.

19897196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185 (or 5183 counting only the distinct ones).

The product of its digits is 244944, while the sum is 50.

The square root of 19897196 is about 4460.6273101437. The cubic root of 19897196 is about 270.9758741793.

The spelling of 19897196 in words is "nineteen million, eight hundred ninety-seven thousand, one hundred ninety-six".