18695093 has 4 divisors (see below), whose sum is σ = 18772908. Its totient is φ = 18617280.

The previous prime is 18695071. The next prime is 18695099. The reversal of 18695093 is 39059681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39059681 = 23 ⋅1698247.

It can be written as a sum of positive squares in 2 ways, for example, as 16826404 + 1868689 = 4102^2 + 1367^2 .

It is a cyclic number.

It is not a de Polignac number, because 18695093 - 2⁶ = 18695029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18695093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18695099) 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 3 ways as a sum of consecutive naturals, for example, 38546 + ... + 39027.

It is an arithmetic number, because the mean of its divisors is an integer number (4693227).

Almost surely, 2^18695093 is an apocalyptic number.

It is an amenable number.

18695093 is a deficient number, since it is larger than the sum of its proper divisors (77815).

18695093 is an equidigital number, since it uses as much as digits as its factorization.

18695093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77814.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 18695093 is about 4323.7822563122. The cubic root of 18695093 is about 265.4050670014.

The spelling of 18695093 in words is "eighteen million, six hundred ninety-five thousand, ninety-three".