18645055 has 32 divisors (see below), whose sum is σ = 26671680. Its totient is φ = 12334080.

The previous prime is 18645047. The next prime is 18645059. The reversal of 18645055 is 55054681.

It is a happy number.

It is not a de Polignac number, because 18645055 - 2³ = 18645047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18645055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18645059) 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 31 ways as a sum of consecutive naturals, for example, 63489 + ... + 63781.

It is an arithmetic number, because the mean of its divisors is an integer number (833490).

Almost surely, 2^18645055 is an apocalyptic number.

18645055 is a deficient number, since it is larger than the sum of its proper divisors (8026625).

18645055 is a wasteful number, since it uses less digits than its factorization.

18645055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411.

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 18645055 is about 4317.9920101825. The cubic root of 18645055 is about 265.1680671140.

The spelling of 18645055 in words is "eighteen million, six hundred forty-five thousand, fifty-five".