18465 has 8 divisors (see below), whose sum is σ = 29568. Its totient is φ = 9840.

The previous prime is 18461. The next prime is 18481. The reversal of 18465 is 56481.

18465 = T₃₆ + T₃₇ + ... + T₅₃.

18465 is nontrivially palindromic in base 4.

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

It is not a de Polignac number, because 18465 - 2² = 18461 is a prime.

It is a Curzon number.

18465 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601 + ... + 630.

It is an arithmetic number, because the mean of its divisors is an integer number (3696).

2¹⁸⁴⁶⁵ is an apocalyptic number.

18465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18465 is a deficient number, since it is larger than the sum of its proper divisors (11103).

18465 is a wasteful number, since it uses less digits than its factorization.

18465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239.

The product of its digits is 960, while the sum is 24.

The square root of 18465 is about 135.8859816169. The cubic root of 18465 is about 26.4311730021.

The spelling of 18465 in words is "eighteen thousand, four hundred sixty-five".