18187960 has 64 divisors (see below), whose sum is σ = 49533120. Its totient is φ = 5867520.

The previous prime is 18187937. The next prime is 18187973. The reversal of 18187960 is 6978181.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2850 + ... + 6670.

It is an arithmetic number, because the mean of its divisors is an integer number (773955).

Almost surely, 2^18187960 is an apocalyptic number.

18187960 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 18187960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24766560).

18187960 is an abundant number, since it is smaller than the sum of its proper divisors (31345160).

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

18187960 is a wasteful number, since it uses less digits than its factorization.

18187960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856 (or 3852 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 18187960 is about 4264.7344583221. The cubic root of 18187960 is about 262.9831946738.

The spelling of 18187960 in words is "eighteen million, one hundred eighty-seven thousand, nine hundred sixty".