18181334 has 8 divisors (see below), whose sum is σ = 27303480. Its totient is φ = 9080176.

The previous prime is 18181301. The next prime is 18181343. The reversal of 18181334 is 43318181.

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

It is a junction number, because it is equal to n+sod(n) for n = 18181297 and 18181306.

It is a congruent number.

It is an unprimeable number.

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, 2864 + ... + 6675.

It is an arithmetic number, because the mean of its divisors is an integer number (3412935).

Almost surely, 2^18181334 is an apocalyptic number.

18181334 is a deficient number, since it is larger than the sum of its proper divisors (9122146).

18181334 is an equidigital number, since it uses as much as digits as its factorization.

18181334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10494.

The product of its digits is 2304, while the sum is 29.

The square root of 18181334 is about 4263.9575513835. The cubic root of 18181334 is about 262.9512552608.

The spelling of 18181334 in words is "eighteen million, one hundred eighty-one thousand, three hundred thirty-four".