18361465 has 4 divisors (see below), whose sum is σ = 22033764. Its totient is φ = 14689168.

The previous prime is 18361439. The next prime is 18361477. The reversal of 18361465 is 56416381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8856576 + 9504889 = 2976^2 + 3083^2 .

It is a cyclic number.

It is not a de Polignac number, because 18361465 - 2⁵ = 18361433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18361465.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1836142 + ... + 1836151.

It is an arithmetic number, because the mean of its divisors is an integer number (5508441).

Almost surely, 2^18361465 is an apocalyptic number.

It is an amenable number.

18361465 is a deficient number, since it is larger than the sum of its proper divisors (3672299).

18361465 is an equidigital number, since it uses as much as digits as its factorization.

18361465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672298.

The product of its digits is 17280, while the sum is 34.

The square root of 18361465 is about 4285.0280045759. The cubic root of 18361465 is about 263.8167968700.

The spelling of 18361465 in words is "eighteen million, three hundred sixty-one thousand, four hundred sixty-five".