205118742 has 16 divisors (see below), whose sum is σ = 411031152. Its totient is φ = 68240640.

The previous prime is 205118741. The next prime is 205118747. The reversal of 205118742 is 247811502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205118741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29683 + ... + 35934.

It is an arithmetic number, because the mean of its divisors is an integer number (25689447).

Almost surely, 2^205118742 is an apocalyptic number.

205118742 is an abundant number, since it is smaller than the sum of its proper divisors (205912410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205118742 is a wasteful number, since it uses less digits than its factorization.

205118742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66143.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 205118742 is about 14321.9671134939. The cubic root of 205118742 is about 589.7506769978.

The spelling of 205118742 in words is "two hundred five million, one hundred eighteen thousand, seven hundred forty-two".