18046140 has 48 divisors (see below), whose sum is σ = 57748992. Its totient is φ = 4124736.

The previous prime is 18046139. The next prime is 18046151. The reversal of 18046140 is 4164081.

It is a self number, because there is not a number n which added to its sum of digits gives 18046140.

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 15 ways as a sum of consecutive naturals, for example, 21064 + ... + 21903.

It is an arithmetic number, because the mean of its divisors is an integer number (1203104).

Almost surely, 2^18046140 is an apocalyptic number.

18046140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18046140 is an abundant number, since it is smaller than the sum of its proper divisors (39702852).

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

18046140 is a wasteful number, since it uses less digits than its factorization.

18046140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42986 (or 42984 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 18046140 is about 4248.0748580975. The cubic root of 18046140 is about 262.2978761515.

The spelling of 18046140 in words is "eighteen million, forty-six thousand, one hundred forty".