18006365 has 8 divisors (see below), whose sum is σ = 23269848. Its totient is φ = 13296960.

The previous prime is 18006353. The next prime is 18006371. The reversal of 18006365 is 56360081.

It can be written as a sum of positive squares in 4 ways, for example, as 383161 + 17623204 = 619^2 + 4198^2 .

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

It is not a de Polignac number, because 18006365 - 2¹⁴ = 17989981 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 138446 + ... + 138575.

It is an arithmetic number, because the mean of its divisors is an integer number (2908731).

Almost surely, 2^18006365 is an apocalyptic number.

It is an amenable number.

18006365 is a deficient number, since it is larger than the sum of its proper divisors (5263483).

18006365 is a wasteful number, since it uses less digits than its factorization.

18006365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277039.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 18006365 is about 4243.3907432618. The cubic root of 18006365 is about 262.1050265564.

The spelling of 18006365 in words is "eighteen million, six thousand, three hundred sixty-five".