18846846720 has 864 divisors, whose sum is σ = 74996812800. Its totient is φ = 4502863872.

The previous prime is 18846846713. The next prime is 18846846727. The reversal of 18846846720 is 2764864881.

It is an interprime number because it is at equal distance from previous prime (18846846713) and next prime (18846846727).

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18846846727) by changing a digit.

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, 238567641 + ... + 238567719.

Almost surely, 2^18846846720 is an apocalyptic number.

18846846720 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 18846846720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37498406400).

18846846720 is an abundant number, since it is smaller than the sum of its proper divisors (56149966080).

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

18846846720 is an equidigital number, since it uses as much as digits as its factorization.

18846846720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 18846846720 in words is "eighteen billion, eight hundred forty-six million, eight hundred forty-six thousand, seven hundred twenty".