18254340 has 144 divisors (see below), whose sum is σ = 61916400. Its totient is φ = 4322304.

The previous prime is 18254323. The next prime is 18254347. The reversal of 18254340 is 4345281.

18254340 is a `hidden beast` number, since 1 + 82 + 543 + 40 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 4460544 + 13793796 = 2112^2 + 3714^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18254347) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67726 + ... + 67994.

It is an arithmetic number, because the mean of its divisors is an integer number (429975).

Almost surely, 2^18254340 is an apocalyptic number.

18254340 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 18254340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30958200).

18254340 is an abundant number, since it is smaller than the sum of its proper divisors (43662060).

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

18254340 is a wasteful number, since it uses less digits than its factorization.

18254340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 18254340 is about 4272.5098010420. The cubic root of 18254340 is about 263.3027399521.

The spelling of 18254340 in words is "eighteen million, two hundred fifty-four thousand, three hundred forty".