18420322773660 has 192 divisors, whose sum is σ = 52629981465600. Its totient is φ = 4813020241920.

The previous prime is 18420322773649. The next prime is 18420322773739. The reversal of 18420322773660 is 6637722302481.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 266189665 + ... + 266258855.

It is an arithmetic number, because the mean of its divisors is an integer number (274114486800).

Almost surely, 2^{18420322773660} is an apocalyptic number.

18420322773660 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 18420322773660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26314990732800).

18420322773660 is an abundant number, since it is smaller than the sum of its proper divisors (34209658691940).

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

18420322773660 is a wasteful number, since it uses less digits than its factorization.

18420322773660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69756 (or 69754 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 51.

The spelling of 18420322773660 in words is "eighteen trillion, four hundred twenty billion, three hundred twenty-two million, seven hundred seventy-three thousand, six hundred sixty".