18364787064 has 144 divisors (see below), whose sum is σ = 56900964120. Its totient is φ = 5318231040.

The previous prime is 18364787059. The next prime is 18364787071. The reversal of 18364787064 is 46078746381.

18364787064 is a `hidden beast` number, since 18 + 36 + 478 + 70 + 64 = 666.

It is a super-3 number, since 3×18364787064³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18364787064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 236559 + ... + 304449.

Almost surely, 2^18364787064 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 18364787064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28450482060).

18364787064 is an abundant number, since it is smaller than the sum of its proper divisors (38536177056).

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

18364787064 is a wasteful number, since it uses less digits than its factorization.

18364787064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67950 (or 67926 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 18364787064 in words is "eighteen billion, three hundred sixty-four million, seven hundred eighty-seven thousand, sixty-four".