18120486 has 16 divisors (see below), whose sum is σ = 36486000. Its totient is φ = 5999328.

The previous prime is 18120463. The next prime is 18120497. The reversal of 18120486 is 68402181.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 9241 + ... + 11028.

It is an arithmetic number, because the mean of its divisors is an integer number (2280375).

Almost surely, 2^18120486 is an apocalyptic number.

18120486 is an abundant number, since it is smaller than the sum of its proper divisors (18365514).

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

18120486 is a wasteful number, since it uses less digits than its factorization.

18120486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20423.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 18120486 is about 4256.8164160555. The cubic root of 18120486 is about 262.6575851974.

The spelling of 18120486 in words is "eighteen million, one hundred twenty thousand, four hundred eighty-six".