19680338 has 4 divisors (see below), whose sum is σ = 29520510. Its totient is φ = 9840168.

The previous prime is 19680329. The next prime is 19680343. The reversal of 19680338 is 83308691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15547249 + 4133089 = 3943^2 + 2033^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4920083 + ... + 4920086.

Almost surely, 2^19680338 is an apocalyptic number.

19680338 is a deficient number, since it is larger than the sum of its proper divisors (9840172).

19680338 is an equidigital number, since it uses as much as digits as its factorization.

19680338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9840171.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 19680338 is about 4436.2526979423. The cubic root of 19680338 is about 269.9878275262.

The spelling of 19680338 in words is "nineteen million, six hundred eighty thousand, three hundred thirty-eight".