218084734305 has 24 divisors (see below), whose sum is σ = 378029619240. Its totient is φ = 116306910720.

The previous prime is 218084734291. The next prime is 218084734321. The reversal of 218084734305 is 503437480812.

It can be written as a sum of positive squares in 4 ways, for example, as 773062416 + 217311671889 = 27804^2 + 466167^2 .

It is not a de Polignac number, because 218084734305 - 2⁴ = 218084734289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1128201 + ... + 1307289.

It is an arithmetic number, because the mean of its divisors is an integer number (15751234135).

Almost surely, 2^218084734305 is an apocalyptic number.

It is an amenable number.

218084734305 is a deficient number, since it is larger than the sum of its proper divisors (159944884935).

218084734305 is a wasteful number, since it uses less digits than its factorization.

218084734305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206161 (or 206158 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 218084734305 in words is "two hundred eighteen billion, eighty-four million, seven hundred thirty-four thousand, three hundred five".