18382390 has 16 divisors (see below), whose sum is σ = 35633808. Its totient is φ = 6787296.

The previous prime is 18382379. The next prime is 18382393. The reversal of 18382390 is 9328381.

It is a super-2 number, since 2×18382390² = 675824524224200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18382393) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 70572 + ... + 70831.

It is an arithmetic number, because the mean of its divisors is an integer number (2227113).

Almost surely, 2^18382390 is an apocalyptic number.

18382390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18382390 is a deficient number, since it is larger than the sum of its proper divisors (17251418).

18382390 is a wasteful number, since it uses less digits than its factorization.

18382390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141423.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 18382390 is about 4287.4689503249. The cubic root of 18382390 is about 263.9169753465.

The spelling of 18382390 in words is "eighteen million, three hundred eighty-two thousand, three hundred ninety".