18493816320 has 960 divisors, whose sum is σ = 78930948096. Its totient is φ = 4060938240.

The previous prime is 18493816279. The next prime is 18493816373. The reversal of 18493816320 is 2361839481.

18493816320 is a `hidden beast` number, since 1 + 8 + 4 + 9 + 3 + 8 + 1 + 632 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 134991292 + ... + 134991428.

Almost surely, 2^18493816320 is an apocalyptic number.

18493816320 is a gapful number since it is divisible by the number (10) 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 18493816320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39465474048).

18493816320 is an abundant number, since it is smaller than the sum of its proper divisors (60437131776).

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

18493816320 is an equidigital number, since it uses as much as digits as its factorization.

18493816320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

It can be divided in two parts, 1849381 and 6320, that added together give a triangular number (1855701 = T₁₉₂₆).

The spelling of 18493816320 in words is "eighteen billion, four hundred ninety-three million, eight hundred sixteen thousand, three hundred twenty".