19919196 has 120 divisors (see below), whose sum is σ = 59520384. Its totient is φ = 5773680.

The previous prime is 19919183. The next prime is 19919197. The reversal of 19919196 is 69191991.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19919197) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 866041 + ... + 866063.

Almost surely, 2^19919196 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19919196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29760192).

19919196 is an abundant number, since it is smaller than the sum of its proper divisors (39601188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19919196 is an equidigital number, since it uses as much as digits as its factorization.

19919196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 39 counting only the distinct ones).

The product of its digits is 39366, while the sum is 45.

The square root of 19919196 is about 4463.0926497217. The cubic root of 19919196 is about 271.0757085716.

The spelling of 19919196 in words is "nineteen million, nine hundred nineteen thousand, one hundred ninety-six".