18059311 has 4 divisors (see below), whose sum is σ = 18499824. Its totient is φ = 17618800.

The previous prime is 18059303. The next prime is 18059317. The reversal of 18059311 is 11395081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18059311 - 2³ = 18059303 is a prime.

It is a super-2 number, since 2×18059311² = 652277427589442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18059311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18059317) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 220195 + ... + 220276.

It is an arithmetic number, because the mean of its divisors is an integer number (4624956).

Almost surely, 2^18059311 is an apocalyptic number.

18059311 is a deficient number, since it is larger than the sum of its proper divisors (440513).

18059311 is an equidigital number, since it uses as much as digits as its factorization.

18059311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440512.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 18059311 is about 4249.6248069683. The cubic root of 18059311 is about 262.3616734546.

The spelling of 18059311 in words is "eighteen million, fifty-nine thousand, three hundred eleven".