19385 has 4 divisors (see below), whose sum is σ = 23268. Its totient is φ = 15504.
The previous prime is 19381. The next prime is 19387. The reversal of 19385 is 58391.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 5929 + 13456 = 77^2 + 116^2 .
It is a cyclic number.
It is not a de Polignac number, because 19385 - 22 = 19381 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (19381) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1934 + ... + 1943.
It is an arithmetic number, because the mean of its divisors is an integer number (5817).
219385 is an apocalyptic number.
It is an amenable number.
19385 is a deficient number, since it is larger than the sum of its proper divisors (3883).
19385 is an equidigital number, since it uses as much as digits as its factorization.
19385 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3882.
The product of its digits is 1080, while the sum is 26.
The square root of 19385 is about 139.2300254974. The cubic root of 19385 is about 26.8630467846.
It can be divided in two parts, 19 and 385, that added together give a palindrome (404).
The spelling of 19385 in words is "nineteen thousand, three hundred eighty-five".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.076 sec. • engine limits •