18414665 has 4 divisors (see below), whose sum is σ = 22097604. Its totient is φ = 14731728.

The previous prime is 18414661. The next prime is 18414673. The reversal of 18414665 is 56641481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56641481 = 13 ⋅4357037.

It can be written as a sum of positive squares in 2 ways, for example, as 2835856 + 15578809 = 1684^2 + 3947^2 .

It is a cyclic number.

It is not a de Polignac number, because 18414665 - 2² = 18414661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18414661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1841462 + ... + 1841471.

It is an arithmetic number, because the mean of its divisors is an integer number (5524401).

Almost surely, 2^18414665 is an apocalyptic number.

It is an amenable number.

18414665 is a deficient number, since it is larger than the sum of its proper divisors (3682939).

18414665 is an equidigital number, since it uses as much as digits as its factorization.

18414665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682938.

The product of its digits is 23040, while the sum is 35.

The square root of 18414665 is about 4291.2311753155. The cubic root of 18414665 is about 264.0713430158.

The spelling of 18414665 in words is "eighteen million, four hundred fourteen thousand, six hundred sixty-five".