18009465 has 16 divisors (see below), whose sum is σ = 29211648. Its totient is φ = 9472896.

The previous prime is 18009463. The next prime is 18009469. The reversal of 18009465 is 56490081.

It is not a de Polignac number, because 18009465 - 2¹ = 18009463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18009461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7129 + ... + 9318.

It is an arithmetic number, because the mean of its divisors is an integer number (1825728).

Almost surely, 2^18009465 is an apocalyptic number.

18009465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18009465 is a deficient number, since it is larger than the sum of its proper divisors (11202183).

18009465 is a wasteful number, since it uses less digits than its factorization.

18009465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16528.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 18009465 is about 4243.7560014685. The cubic root of 18009465 is about 262.1200671445.

The spelling of 18009465 in words is "eighteen million, nine thousand, four hundred sixty-five".