18454 has 4 divisors (see below), whose sum is σ = 27684.
Its totient is φ = 9226.
The previous prime is 18451. The next prime is 18457. The reversal of 18454 is 45481.
It can be divided in two parts, 1845 and 4, that added together give a square (1849 = 432).
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (18451) and next prime (18457).
It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (18451) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4612 + ... + 4615.
It is an arithmetic number, because the mean of its divisors is an integer number (6921).
218454 is an apocalyptic number.
18454 is a deficient number, since it is larger than the sum of its proper divisors (9230).
18454 is an equidigital number, since it uses as much as digits as its factorization.
18454 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 9229.
The product of its digits is 640, while the sum is 22.
The square root of 18454 is about 135.8455004776.
The cubic root of 18454 is about 26.4259234190.
The spelling of 18454 in words is "eighteen thousand, four hundred fifty-four".