18613140 has 144 divisors (see below), whose sum is σ = 65423232. Its totient is φ = 3919104.

The previous prime is 18613129. The next prime is 18613163. The reversal of 18613140 is 4131681.

It is a self number, because there is not a number n which added to its sum of digits gives 18613140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37977 + ... + 38463.

It is an arithmetic number, because the mean of its divisors is an integer number (454328).

Almost surely, 2^18613140 is an apocalyptic number.

18613140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18613140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32711616).

18613140 is an abundant number, since it is smaller than the sum of its proper divisors (46810092).

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

18613140 is a wasteful number, since it uses less digits than its factorization.

18613140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 18613140 is about 4314.2948438882. The cubic root of 18613140 is about 265.0166834162.

The spelling of 18613140 in words is "eighteen million, six hundred thirteen thousand, one hundred forty".