18507040 has 48 divisors (see below), whose sum is σ = 44186688. Its totient is φ = 7324416.

The previous prime is 18507037. The next prime is 18507077. The reversal of 18507040 is 4070581.

It is a junction number, because it is equal to n+sod(n) for n = 18506996 and 18507014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15919 + ... + 17041.

It is an arithmetic number, because the mean of its divisors is an integer number (920556).

Almost surely, 2^18507040 is an apocalyptic number.

18507040 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 18507040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22093344).

18507040 is an abundant number, since it is smaller than the sum of its proper divisors (25679648).

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

18507040 is a wasteful number, since it uses less digits than its factorization.

18507040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241 (or 1233 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 18507040 is about 4301.9809390559. The cubic root of 18507040 is about 264.5121676596.

The spelling of 18507040 in words is "eighteen million, five hundred seven thousand, forty".