18226159 has 16 divisors (see below), whose sum is σ = 22284288. Its totient is φ = 14550912.

The previous prime is 18226147. The next prime is 18226199. The reversal of 18226159 is 95162281.

It is not a de Polignac number, because 18226159 - 2⁷ = 18226031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18226139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11514 + ... + 13000.

It is an arithmetic number, because the mean of its divisors is an integer number (1392768).

Almost surely, 2^18226159 is an apocalyptic number.

18226159 is a deficient number, since it is larger than the sum of its proper divisors (4058129).

18226159 is a wasteful number, since it uses less digits than its factorization.

18226159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614.

The product of its digits is 8640, while the sum is 34.

The square root of 18226159 is about 4269.2105827659. The cubic root of 18226159 is about 263.1671748173.

The spelling of 18226159 in words is "eighteen million, two hundred twenty-six thousand, one hundred fifty-nine".