205850502123 has 16 divisors (see below), whose sum is σ = 313759170816. Its totient is φ = 117598027680.

The previous prime is 205850502119. The next prime is 205850502157. The reversal of 205850502123 is 321205058502.

It is not a de Polignac number, because 205850502123 - 2² = 205850502119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205850502103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1202461 + ... + 1362942.

It is an arithmetic number, because the mean of its divisors is an integer number (19609948176).

Almost surely, 2^205850502123 is an apocalyptic number.

205850502123 is a deficient number, since it is larger than the sum of its proper divisors (107908668693).

205850502123 is a wasteful number, since it uses less digits than its factorization.

205850502123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569234.

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 205850502123 in words is "two hundred five billion, eight hundred fifty million, five hundred two thousand, one hundred twenty-three".