18059445 has 12 divisors (see below), whose sum is σ = 31303116. Its totient is φ = 9631680.

The previous prime is 18059429. The next prime is 18059473. The reversal of 18059445 is 54495081.

It can be written as a sum of positive squares in 2 ways, for example, as 3359889 + 14699556 = 1833^2 + 3834^2 .

It is not a de Polignac number, because 18059445 - 2⁴ = 18059429 is a prime.

It is a super-2 number, since 2×18059445² = 652287107416050, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 200616 + ... + 200705.

It is an arithmetic number, because the mean of its divisors is an integer number (2608593).

Almost surely, 2^18059445 is an apocalyptic number.

18059445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18059445 is a deficient number, since it is larger than the sum of its proper divisors (13243671).

18059445 is a wasteful number, since it uses less digits than its factorization.

18059445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401332 (or 401329 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 18059445 is about 4249.6405730367. The cubic root of 18059445 is about 262.3623223604.

The spelling of 18059445 in words is "eighteen million, fifty-nine thousand, four hundred forty-five".