18004965 has 16 divisors (see below), whose sum is σ = 31427136. Its totient is φ = 8729600.

The previous prime is 18004963. The next prime is 18004991. The reversal of 18004965 is 56940081.

It is not a de Polignac number, because 18004965 - 2¹ = 18004963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18004963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54396 + ... + 54725.

It is an arithmetic number, because the mean of its divisors is an integer number (1964196).

Almost surely, 2^18004965 is an apocalyptic number.

18004965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18004965 is a deficient number, since it is larger than the sum of its proper divisors (13422171).

18004965 is a wasteful number, since it uses less digits than its factorization.

18004965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109140.

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

The square root of 18004965 is about 4243.2257776366. The cubic root of 18004965 is about 262.0982334669.

The spelling of 18004965 in words is "eighteen million, four thousand, nine hundred sixty-five".