18853650816 has 720 divisors, whose sum is σ = 69537009780. Its totient is φ = 4520355840.

The previous prime is 18853650787. The next prime is 18853650821. The reversal of 18853650816 is 61805635881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 1450280826 + ... + 1450280838.

Almost surely, 2^18853650816 is an apocalyptic number.

18853650816 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 18853650816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34768504890).

18853650816 is an abundant number, since it is smaller than the sum of its proper divisors (50683358964).

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

18853650816 is an equidigital number, since it uses as much as digits as its factorization.

18853650816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 51.

The spelling of 18853650816 in words is "eighteen billion, eight hundred fifty-three million, six hundred fifty thousand, eight hundred sixteen".