18086465 has 4 divisors (see below), whose sum is σ = 21703764. Its totient is φ = 14469168.

The previous prime is 18086429. The next prime is 18086473. The reversal of 18086465 is 56468081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56468081 = 31 ⋅1821551.

It can be written as a sum of positive squares in 2 ways, for example, as 3094081 + 14992384 = 1759^2 + 3872^2 .

It is a cyclic number.

It is not a de Polignac number, because 18086465 - 2⁸ = 18086209 is a prime.

It is a Duffinian number.

It is a Curzon 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, 1808642 + ... + 1808651.

It is an arithmetic number, because the mean of its divisors is an integer number (5425941).

Almost surely, 2^18086465 is an apocalyptic number.

It is an amenable number.

18086465 is a deficient number, since it is larger than the sum of its proper divisors (3617299).

18086465 is an equidigital number, since it uses as much as digits as its factorization.

18086465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617298.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 18086465 is about 4252.8184771984. The cubic root of 18086465 is about 262.4931033713.

The spelling of 18086465 in words is "eighteen million, eighty-six thousand, four hundred sixty-five".