18158226 has 8 divisors (see below), whose sum is σ = 36316464. Its totient is φ = 6052740.

The previous prime is 18158209. The next prime is 18158233. The reversal of 18158226 is 62285181.

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

18158226 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513180 + ... + 1513191.

It is an arithmetic number, because the mean of its divisors is an integer number (4539558).

Almost surely, 2^18158226 is an apocalyptic number.

18158226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18158226 is a wasteful number, since it uses less digits than its factorization.

18158226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026376.

The product of its digits is 7680, while the sum is 33.

The square root of 18158226 is about 4261.2470005856. The cubic root of 18158226 is about 262.8398066420.

The spelling of 18158226 in words is "eighteen million, one hundred fifty-eight thousand, two hundred twenty-six".