18809049 has 8 divisors (see below), whose sum is σ = 28661440. Its totient is φ = 10748016.

The previous prime is 18809047. The next prime is 18809051. The reversal of 18809049 is 94090881.

It is an interprime number because it is at equal distance from previous prime (18809047) and next prime (18809051).

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

It is not a de Polignac number, because 18809049 - 2¹ = 18809047 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18808998 and 18809016.

It is not an unprimeable number, because it can be changed into a prime (18809041) 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, 447814 + ... + 447855.

It is an arithmetic number, because the mean of its divisors is an integer number (3582680).

Almost surely, 2^18809049 is an apocalyptic number.

It is an amenable number.

18809049 is a deficient number, since it is larger than the sum of its proper divisors (9852391).

18809049 is an equidigital number, since it uses as much as digits as its factorization.

18809049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895679.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 18809049 is about 4336.9400503120. The cubic root of 18809049 is about 265.9432341603.

The spelling of 18809049 in words is "eighteen million, eight hundred nine thousand, forty-nine".