18113040 has 120 divisors (see below), whose sum is σ = 66388608. Its totient is φ = 4389120.

The previous prime is 18113033. The next prime is 18113047. The reversal of 18113040 is 4031181.

It is an interprime number because it is at equal distance from previous prime (18113033) and next prime (18113047).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (18113047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6777 + ... + 9063.

Almost surely, 2^18113040 is an apocalyptic number.

18113040 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 18113040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33194304).

18113040 is an abundant number, since it is smaller than the sum of its proper divisors (48275568).

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

18113040 is a wasteful number, since it uses less digits than its factorization.

18113040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317 (or 2308 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 18113040 is about 4255.9417289244. The cubic root of 18113040 is about 262.6216035222.

It can be divided in two parts, 1811 and 3040, that added together give a triangular number (4851 = T₉₈).

The spelling of 18113040 in words is "eighteen million, one hundred thirteen thousand, forty".