18616055 has 4 divisors (see below), whose sum is σ = 22339272. Its totient is φ = 14892840.

The previous prime is 18616007. The next prime is 18616061. The reversal of 18616055 is 55061681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55061681 = 487 ⋅113063.

It is not a de Polignac number, because 18616055 - 2²⁰ = 17567479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1861601 + ... + 1861610.

It is an arithmetic number, because the mean of its divisors is an integer number (5584818).

Almost surely, 2^18616055 is an apocalyptic number.

18616055 is a deficient number, since it is larger than the sum of its proper divisors (3723217).

18616055 is an equidigital number, since it uses as much as digits as its factorization.

18616055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723216.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 18616055 is about 4314.6326610732. The cubic root of 18616055 is about 265.0305174301.

The spelling of 18616055 in words is "eighteen million, six hundred sixteen thousand, fifty-five".