18159146 has 8 divisors (see below), whose sum is σ = 27903204. Its totient is φ = 8858080.

The previous prime is 18159143. The next prime is 18159157. The reversal of 18159146 is 64195181.

It can be written as a sum of positive squares in 2 ways, for example, as 18156121 + 3025 = 4261^2 + 55^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18159143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110645 + ... + 110808.

Almost surely, 2^18159146 is an apocalyptic number.

18159146 is a deficient number, since it is larger than the sum of its proper divisors (9744058).

18159146 is a wasteful number, since it uses less digits than its factorization.

18159146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221496.

The product of its digits is 8640, while the sum is 35.

The square root of 18159146 is about 4261.3549488396. The cubic root of 18159146 is about 262.8442455583.

The spelling of 18159146 in words is "eighteen million, one hundred fifty-nine thousand, one hundred forty-six".