19800396 has 96 divisors (see below), whose sum is σ = 64028160. Its totient is φ = 5140800.

The previous prime is 19800383. The next prime is 19800421. The reversal of 19800396 is 69300891.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 19800396.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7126 + ... + 9506.

It is an arithmetic number, because the mean of its divisors is an integer number (666960).

Almost surely, 2^19800396 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 19800396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32014080).

19800396 is an abundant number, since it is smaller than the sum of its proper divisors (44227764).

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

19800396 is a wasteful number, since it uses less digits than its factorization.

19800396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412 (or 2404 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 19800396 is about 4449.7635892258. The cubic root of 19800396 is about 270.5357264470.

The spelling of 19800396 in words is "nineteen million, eight hundred thousand, three hundred ninety-six".