18717480000 has 700 divisors, whose sum is σ = 71289664380. Its totient is φ = 4852224000.

The previous prime is 18717479999. The next prime is 18717480011. The reversal of 18717480000 is 8471781.

It can be written as a sum of positive squares in 10 ways, for example, as 10630434816 + 8087045184 = 103104^2 + 89928^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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 99 ways as a sum of consecutive naturals, for example, 171719946 + ... + 171720054.

Almost surely, 2^18717480000 is an apocalyptic number.

18717480000 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 18717480000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35644832190).

18717480000 is an abundant number, since it is smaller than the sum of its proper divisors (52572184380).

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

18717480000 is an equidigital number, since it uses as much as digits as its factorization.

18717480000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The spelling of 18717480000 in words is "eighteen billion, seven hundred seventeen million, four hundred eighty thousand".