205100210730 has 64 divisors (see below), whose sum is σ = 510051852288. Its totient is φ = 52727772480.

The previous prime is 205100210677. The next prime is 205100210753. The reversal of 205100210730 is 37012001502.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 205100210697 and 205100210706.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174684 + ... + 663863.

It is an arithmetic number, because the mean of its divisors is an integer number (7969560192).

Almost surely, 2^205100210730 is an apocalyptic number.

205100210730 is an abundant number, since it is smaller than the sum of its proper divisors (304951641558).

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

205100210730 is a wasteful number, since it uses less digits than its factorization.

205100210730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838851.

The product of its (nonzero) digits is 420, while the sum is 21.

The spelling of 205100210730 in words is "two hundred five billion, one hundred million, two hundred ten thousand, seven hundred thirty".