18818089 has 8 divisors (see below), whose sum is σ = 19617728. Its totient is φ = 18033840.

The previous prime is 18818083. The next prime is 18818119. The reversal of 18818089 is 98081881.

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

It is a cyclic number.

It is not a de Polignac number, because 18818089 - 2³ = 18818081 is a prime.

It is a super-2 number, since 2×18818089² = 708240947223842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18818081) 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, 1317 + ... + 6274.

It is an arithmetic number, because the mean of its divisors is an integer number (2452216).

Almost surely, 2^18818089 is an apocalyptic number.

It is an amenable number.

18818089 is a deficient number, since it is larger than the sum of its proper divisors (799639).

18818089 is an equidigital number, since it uses as much as digits as its factorization.

18818089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7695.

The product of its (nonzero) digits is 36864, while the sum is 43.

The square root of 18818089 is about 4337.9821345875. The cubic root of 18818089 is about 265.9858331913.

The spelling of 18818089 in words is "eighteen million, eight hundred eighteen thousand, eighty-nine".