18120546 has 24 divisors (see below), whose sum is σ = 39761280. Its totient is φ = 5963256.

The previous prime is 18120517. The next prime is 18120559. The reversal of 18120546 is 64502181.

It is a plaindrome in base 14.

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 11 ways as a sum of consecutive naturals, for example, 4950 + ... + 7793.

It is an arithmetic number, because the mean of its divisors is an integer number (1656720).

Almost surely, 2^18120546 is an apocalyptic number.

18120546 is an abundant number, since it is smaller than the sum of its proper divisors (21640734).

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

18120546 is a wasteful number, since it uses less digits than its factorization.

18120546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12830 (or 12827 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18120546 is about 4256.8234635700. The cubic root of 18120546 is about 262.6578750983.

The spelling of 18120546 in words is "eighteen million, one hundred twenty thousand, five hundred forty-six".