205205205703 has 4 divisors (see below), whose sum is σ = 205275316320. Its totient is φ = 205135095088.

The previous prime is 205205205691. The next prime is 205205205707. The reversal of 205205205703 is 307502502502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205205205703 - 2¹³ = 205205197511 is a prime.

It is a super-2 number, since 2×205205205703² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205205205707) 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, 35050918 + ... + 35056771.

It is an arithmetic number, because the mean of its divisors is an integer number (51318829080).

Almost surely, 2^205205205703 is an apocalyptic number.

205205205703 is a deficient number, since it is larger than the sum of its proper divisors (70110617).

205205205703 is an equidigital number, since it uses as much as digits as its factorization.

205205205703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70110616.

The product of its (nonzero) digits is 21000, while the sum is 31.

The spelling of 205205205703 in words is "two hundred five billion, two hundred five million, two hundred five thousand, seven hundred three".