18849659504336 has 80 divisors (see below), whose sum is σ = 38943364322304. Its totient is φ = 8818709932032.

The previous prime is 18849659504321. The next prime is 18849659504363. The reversal of 18849659504336 is 63340595694881.

It is a self number, because there is not a number n which added to its sum of digits gives 18849659504336.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5138945 + ... + 8006751.

Almost surely, 2^{18849659504336} is an apocalyptic number.

18849659504336 is a gapful number since it is divisible by the number (16) 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 18849659504336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19471682161152).

18849659504336 is an abundant number, since it is smaller than the sum of its proper divisors (20093704817968).

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

18849659504336 is a wasteful number, since it uses less digits than its factorization.

18849659504336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868228 (or 2868222 counting only the distinct ones).

The product of its (nonzero) digits is 671846400, while the sum is 71.

The spelling of 18849659504336 in words is "eighteen trillion, eight hundred forty-nine billion, six hundred fifty-nine million, five hundred four thousand, three hundred thirty-six".