18354813 has 8 divisors (see below), whose sum is σ = 24502176. Its totient is φ = 12222000.

The previous prime is 18354799. The next prime is 18354823. The reversal of 18354813 is 31845381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18354813 - 2⁴ = 18354797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18354823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238 + ... + 6063.

It is an arithmetic number, because the mean of its divisors is an integer number (3062772).

Almost surely, 2^18354813 is an apocalyptic number.

It is an amenable number.

18354813 is a deficient number, since it is larger than the sum of its proper divisors (6147363).

18354813 is an equidigital number, since it uses as much as digits as its factorization.

18354813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7275.

The product of its digits is 11520, while the sum is 33.

The square root of 18354813 is about 4284.2517433036. The cubic root of 18354813 is about 263.7849344650.

The spelling of 18354813 in words is "eighteen million, three hundred fifty-four thousand, eight hundred thirteen".