18061140 has 48 divisors (see below), whose sum is σ = 53548992. Its totient is φ = 4532736.

The previous prime is 18061111. The next prime is 18061163. The reversal of 18061140 is 4116081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7834 + ... + 9873.

It is an arithmetic number, because the mean of its divisors is an integer number (1115604).

Almost surely, 2^18061140 is an apocalyptic number.

18061140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18061140 is an abundant number, since it is smaller than the sum of its proper divisors (35487852).

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

18061140 is a wasteful number, since it uses less digits than its factorization.

18061140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17736 (or 17734 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 18061140 is about 4249.8399969881. The cubic root of 18061140 is about 262.3705302580.

The spelling of 18061140 in words is "eighteen million, sixty-one thousand, one hundred forty".