18416585720 has 192 divisors, whose sum is σ = 47690532000. Its totient is φ = 6385526784.

The previous prime is 18416585717. The next prime is 18416585729. The reversal of 18416585720 is 2758561481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18416585729) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 7252211 + ... + 7254749.

Almost surely, 2^18416585720 is an apocalyptic number.

18416585720 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 18416585720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23845266000).

18416585720 is an abundant number, since it is smaller than the sum of its proper divisors (29273946280).

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

18416585720 is a wasteful number, since it uses less digits than its factorization.

18416585720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642 (or 2625 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 47.

The spelling of 18416585720 in words is "eighteen billion, four hundred sixteen million, five hundred eighty-five thousand, seven hundred twenty".