18201787086 has 128 divisors (see below), whose sum is σ = 46550384640. Its totient is φ = 4618944000.

The previous prime is 18201787073. The next prime is 18201787117. The reversal of 18201787086 is 68078710281.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3673911 + ... + 3678861.

It is an arithmetic number, because the mean of its divisors is an integer number (363674880).

Almost surely, 2^18201787086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18201787086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23275192320).

18201787086 is an abundant number, since it is smaller than the sum of its proper divisors (28348597554).

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

18201787086 is a wasteful number, since it uses less digits than its factorization.

18201787086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5270.

The product of its (nonzero) digits is 301056, while the sum is 48.

The spelling of 18201787086 in words is "eighteen billion, two hundred one million, seven hundred eighty-seven thousand, eighty-six".