18382090 has 8 divisors (see below), whose sum is σ = 33087780. Its totient is φ = 7352832.

The previous prime is 18382079. The next prime is 18382097. The reversal of 18382090 is 9028381.

It can be written as a sum of positive squares in 2 ways, for example, as 18378369 + 3721 = 4287^2 + 61^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18382097) 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 3 ways as a sum of consecutive naturals, for example, 919095 + ... + 919114.

Almost surely, 2^18382090 is an apocalyptic number.

18382090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18382090 is a deficient number, since it is larger than the sum of its proper divisors (14705690).

18382090 is a wasteful number, since it uses less digits than its factorization.

18382090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838216.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 18382090 is about 4287.4339645060. The cubic root of 18382090 is about 263.9155396332.

The spelling of 18382090 in words is "eighteen million, three hundred eighty-two thousand, ninety".