18944065 has 32 divisors (see below), whose sum is σ = 27495936. Its totient is φ = 12249600.

The previous prime is 18944063. The next prime is 18944117. The reversal of 18944065 is 56044981.

It is a happy number.

It is not a de Polignac number, because 18944065 - 2¹ = 18944063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18944063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81189 + ... + 81421.

It is an arithmetic number, because the mean of its divisors is an integer number (859248).

Almost surely, 2^18944065 is an apocalyptic number.

It is an amenable number.

18944065 is a deficient number, since it is larger than the sum of its proper divisors (8551871).

18944065 is a wasteful number, since it uses less digits than its factorization.

18944065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 18944065 is about 4352.4780298124. The cubic root of 18944065 is about 266.5780530221.

The spelling of 18944065 in words is "eighteen million, nine hundred forty-four thousand, sixty-five".