218285770000 has 50 divisors (see below), whose sum is σ = 528491701958. Its totient is φ = 87314304000.

The previous prime is 218285769979. The next prime is 218285770007. The reversal of 218285770000 is 77582812.

218285770000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 65210772496 + 153074997504 = 255364^2 + 391248^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (218285770007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10904289 + ... + 10924288.

Almost surely, 2^218285770000 is an apocalyptic number.

218285770000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218285770000 is an abundant number, since it is smaller than the sum of its proper divisors (310205931958).

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

218285770000 is an equidigital number, since it uses as much as digits as its factorization.

218285770000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21828605 (or 21828584 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The spelling of 218285770000 in words is "two hundred eighteen billion, two hundred eighty-five million, seven hundred seventy thousand".