19682109 has 10 divisors (see below), whose sum is σ = 29401790. Its totient is φ = 13121352.

The previous prime is 19682099. The next prime is 19682137. The reversal of 19682109 is 90128691.

It can be written as a sum of positive squares in only one way, i.e., 10208025 + 9474084 = 3195^2 + 3078^2 .

It is not a de Polignac number, because 19682109 - 2⁴ = 19682093 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 (19672109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 121414 + ... + 121575.

It is an arithmetic number, because the mean of its divisors is an integer number (2940179).

Almost surely, 2^19682109 is an apocalyptic number.

It is an amenable number.

19682109 is a deficient number, since it is larger than the sum of its proper divisors (9719681).

19682109 is an equidigital number, since it uses as much as digits as its factorization.

19682109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243001 (or 242992 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 19682109 is about 4436.4522988532. The cubic root of 19682109 is about 269.9959258645.

It can be divided in two parts, 19682 and 109, that added together give a palindrome (19791).

The spelling of 19682109 in words is "nineteen million, six hundred eighty-two thousand, one hundred nine".