205740231773 has 4 divisors (see below), whose sum is σ = 205775233440. Its totient is φ = 205705230108.

The previous prime is 205740231727. The next prime is 205740231791. The reversal of 205740231773 is 377132047502.

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 205740231773 - 2¹⁸ = 205739969629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205740231773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205740234773) 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, 17492015 + ... + 17503772.

It is an arithmetic number, because the mean of its divisors is an integer number (51443808360).

Almost surely, 2^205740231773 is an apocalyptic number.

It is an amenable number.

205740231773 is a deficient number, since it is larger than the sum of its proper divisors (35001667).

205740231773 is an equidigital number, since it uses as much as digits as its factorization.

205740231773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35001666.

The product of its (nonzero) digits is 246960, while the sum is 41.

The spelling of 205740231773 in words is "two hundred five billion, seven hundred forty million, two hundred thirty-one thousand, seven hundred seventy-three".