205173238473 has 12 divisors (see below), whose sum is σ = 338698679488. Its totient is φ = 117241850520.

The previous prime is 205173238471. The next prime is 205173238477. The reversal of 205173238473 is 374832371502.

It is a happy number.

205173238473 is a `hidden beast` number, since 2 + 0 + 5 + 173 + 2 + 3 + 8 + 473 = 666.

It is not a de Polignac number, because 205173238473 - 2¹ = 205173238471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205173238471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1628358973 + ... + 1628359098.

Almost surely, 2^205173238473 is an apocalyptic number.

It is an amenable number.

205173238473 is a deficient number, since it is larger than the sum of its proper divisors (133525441015).

205173238473 is a wasteful number, since it uses less digits than its factorization.

205173238473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3256718084 (or 3256718081 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 205173238473 in words is "two hundred five billion, one hundred seventy-three million, two hundred thirty-eight thousand, four hundred seventy-three".