205002193771 has 16 divisors (see below), whose sum is σ = 207867783168. Its totient is φ = 202156416000.

The previous prime is 205002193769. The next prime is 205002193777. The reversal of 205002193771 is 177391200502.

It is a cyclic number.

It is not a de Polignac number, because 205002193771 - 2¹ = 205002193769 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 205002193771.

It is not an unprimeable number, because it can be changed into a prime (205002193777) 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, 21347371 + ... + 21356971.

It is an arithmetic number, because the mean of its divisors is an integer number (12991736448).

Almost surely, 2^205002193771 is an apocalyptic number.

205002193771 is a deficient number, since it is larger than the sum of its proper divisors (2865589397).

205002193771 is a wasteful number, since it uses less digits than its factorization.

205002193771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10602.

The product of its (nonzero) digits is 26460, while the sum is 37.

The spelling of 205002193771 in words is "two hundred five billion, two million, one hundred ninety-three thousand, seven hundred seventy-one".