18036286784 has 56 divisors (see below), whose sum is σ = 36470965920. Its totient is φ = 8847373824.

The previous prime is 18036286783. The next prime is 18036286819. The reversal of 18036286784 is 48768263081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18036286781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1970282 + ... + 1979414.

Almost surely, 2^18036286784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18036286784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18235482960).

18036286784 is an abundant number, since it is smaller than the sum of its proper divisors (18434679136).

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

18036286784 is an equidigital number, since it uses as much as digits as its factorization.

18036286784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9727 (or 9717 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 18036286784 in words is "eighteen billion, thirty-six million, two hundred eighty-six thousand, seven hundred eighty-four".