218705050520 has 64 divisors (see below), whose sum is σ = 560161578240. Its totient is φ = 76071318400.

The previous prime is 218705050493. The next prime is 218705050573. The reversal of 218705050520 is 25050507812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10795466 + ... + 10815705.

It is an arithmetic number, because the mean of its divisors is an integer number (8752524660).

Almost surely, 2^218705050520 is an apocalyptic number.

218705050520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218705050520 is an abundant number, since it is smaller than the sum of its proper divisors (341456527720).

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

218705050520 is a wasteful number, since it uses less digits than its factorization.

218705050520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21611216 (or 21611212 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 35.

The spelling of 218705050520 in words is "two hundred eighteen billion, seven hundred five million, fifty thousand, five hundred twenty".