19794685 has 4 divisors (see below), whose sum is σ = 23753628. Its totient is φ = 15835744.

The previous prime is 19794641. The next prime is 19794701. The reversal of 19794685 is 58649791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58649791 = 101 ⋅580691.

It can be written as a sum of positive squares in 2 ways, for example, as 9108324 + 10686361 = 3018^2 + 3269^2 .

It is a cyclic number.

It is not a de Polignac number, because 19794685 - 2¹⁹ = 19270397 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1979464 + ... + 1979473.

It is an arithmetic number, because the mean of its divisors is an integer number (5938407).

Almost surely, 2^19794685 is an apocalyptic number.

It is an amenable number.

19794685 is a deficient number, since it is larger than the sum of its proper divisors (3958943).

19794685 is an equidigital number, since it uses as much as digits as its factorization.

19794685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958942.

The product of its digits is 544320, while the sum is 49.

The square root of 19794685 is about 4449.1218234613. The cubic root of 19794685 is about 270.5097138679.

The spelling of 19794685 in words is "nineteen million, seven hundred ninety-four thousand, six hundred eighty-five".