18344090 has 16 divisors (see below), whose sum is σ = 33165288. Its totient is φ = 7305216.

The previous prime is 18344083. The next prime is 18344093. The reversal of 18344090 is 9044381.

It is a Cunningham number, because it is equal to 4283²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 6599761 + 11744329 = 2569^2 + 3427^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18344093) 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, 1607 + ... + 6266.

Almost surely, 2^18344090 is an apocalyptic number.

18344090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18344090 is a deficient number, since it is larger than the sum of its proper divisors (14821198).

18344090 is a wasteful number, since it uses less digits than its factorization.

18344090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8113.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 18344090 is about 4283.0001167406. Note that the first 3 decimals coincide. The cubic root of 18344090 is about 263.7335561725.

The spelling of 18344090 in words is "eighteen million, three hundred forty-four thousand, ninety".