205942064073 has 4 divisors (see below), whose sum is σ = 274589418768. Its totient is φ = 137294709380.

The previous prime is 205942064051. The next prime is 205942064077. The reversal of 205942064073 is 370460249502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205942064073 - 2¹⁰ = 205942063049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205942064077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34323677343 + ... + 34323677348.

It is an arithmetic number, because the mean of its divisors is an integer number (68647354692).

Almost surely, 2^205942064073 is an apocalyptic number.

It is an amenable number.

205942064073 is a deficient number, since it is larger than the sum of its proper divisors (68647354695).

205942064073 is an equidigital number, since it uses as much as digits as its factorization.

205942064073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68647354694.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 205942064073 in words is "two hundred five billion, nine hundred forty-two million, sixty-four thousand, seventy-three".