18071059 has 4 divisors (see below), whose sum is σ = 18559504. Its totient is φ = 17582616.

The previous prime is 18070999. The next prime is 18071087. The reversal of 18071059 is 95017081.

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 18071059 - 2¹³ = 18062867 is a prime.

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 18071059.

It is not an unprimeable number, because it can be changed into a prime (18071159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244167 + ... + 244240.

It is an arithmetic number, because the mean of its divisors is an integer number (4639876).

Almost surely, 2^18071059 is an apocalyptic number.

18071059 is a deficient number, since it is larger than the sum of its proper divisors (488445).

18071059 is an equidigital number, since it uses as much as digits as its factorization.

18071059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488444.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 18071059 is about 4251.0068219188. The cubic root of 18071059 is about 262.4185519041.

The spelling of 18071059 in words is "eighteen million, seventy-one thousand, fifty-nine".