218076505920 has 672 divisors, whose sum is σ = 977515838208. Its totient is φ = 43304288256.

The previous prime is 218076505909. The next prime is 218076505957. The reversal of 218076505920 is 29505670812.

218076505920 is a `hidden beast` number, since 2 + 1 + 8 + 0 + 7 + 6 + 50 + 592 + 0 = 666.

218076505920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (672).

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 (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4430887 + ... + 4479833.

It is an arithmetic number, because the mean of its divisors is an integer number (1454636664).

Almost surely, 2^218076505920 is an apocalyptic number.

218076505920 is a gapful number since it is divisible by the number (20) 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 218076505920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488757919104).

218076505920 is an abundant number, since it is smaller than the sum of its proper divisors (759439332288).

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

218076505920 is a wasteful number, since it uses less digits than its factorization.

218076505920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49007 (or 48994 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 218076505920 in words is "two hundred eighteen billion, seventy-six million, five hundred five thousand, nine hundred twenty".