18390165 has 8 divisors (see below), whose sum is σ = 29424288. Its totient is φ = 9808080.

The previous prime is 18390131. The next prime is 18390167. The reversal of 18390165 is 56109381.

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

It is not a de Polignac number, because 18390165 - 2⁶ = 18390101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18390167) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 612991 + ... + 613020.

It is an arithmetic number, because the mean of its divisors is an integer number (3678036).

Almost surely, 2^18390165 is an apocalyptic number.

18390165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18390165 is a deficient number, since it is larger than the sum of its proper divisors (11034123).

18390165 is a wasteful number, since it uses less digits than its factorization.

18390165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226019.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 18390165 is about 4288.3755665753. The cubic root of 18390165 is about 263.9541788014.

The spelling of 18390165 in words is "eighteen million, three hundred ninety thousand, one hundred sixty-five".