18090655 has 8 divisors (see below), whose sum is σ = 23682384. Its totient is φ = 13156800.

The previous prime is 18090643. The next prime is 18090689. The reversal of 18090655 is 55609081.

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

It is not a de Polignac number, because 18090655 - 2⁵ = 18090623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18090655.

It is a congruent number.

It is an unprimeable number.

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, 164406 + ... + 164515.

It is an arithmetic number, because the mean of its divisors is an integer number (2960298).

Almost surely, 2^18090655 is an apocalyptic number.

18090655 is a deficient number, since it is larger than the sum of its proper divisors (5591729).

18090655 is a wasteful number, since it uses less digits than its factorization.

18090655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328937.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 18090655 is about 4253.3110631601. The cubic root of 18090655 is about 262.5133719568.

The spelling of 18090655 in words is "eighteen million, ninety thousand, six hundred fifty-five".