18229180 has 12 divisors (see below), whose sum is σ = 38281320. Its totient is φ = 7291664.

The previous prime is 18229177. The next prime is 18229201. The reversal of 18229180 is 8192281.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 455710 + ... + 455749.

It is an arithmetic number, because the mean of its divisors is an integer number (3190110).

Almost surely, 2^18229180 is an apocalyptic number.

18229180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18229180 is an abundant number, since it is smaller than the sum of its proper divisors (20052140).

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

18229180 is a wasteful number, since it uses less digits than its factorization.

18229180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911468 (or 911466 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18229180 is about 4269.5643805897. The cubic root of 18229180 is about 263.1817140685.

The spelling of 18229180 in words is "eighteen million, two hundred twenty-nine thousand, one hundred eighty".