18187002240 has 256 divisors, whose sum is σ = 63478598400. Its totient is φ = 4392427520.

The previous prime is 18187002199. The next prime is 18187002269. The reversal of 18187002240 is 4220078181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6186691 + ... + 6189629.

It is an arithmetic number, because the mean of its divisors is an integer number (247963275).

Almost surely, 2^18187002240 is an apocalyptic number.

18187002240 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 18187002240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31739299200).

18187002240 is an abundant number, since it is smaller than the sum of its proper divisors (45291596160).

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

18187002240 is a wasteful number, since it uses less digits than its factorization.

18187002240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265 (or 3253 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The spelling of 18187002240 in words is "eighteen billion, one hundred eighty-seven million, two thousand, two hundred forty".