205042683220242 has 64 divisors (see below), whose sum is σ = 486726004706304. Its totient is φ = 56367165919680.

The previous prime is 205042683220213. The next prime is 205042683220261. The reversal of 205042683220242 is 242022386240502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 205042683220194 and 205042683220203.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 847148809 + ... + 847390812.

It is an arithmetic number, because the mean of its divisors is an integer number (7605093823536).

Almost surely, 2^{205042683220242} is an apocalyptic number.

205042683220242 is an abundant number, since it is smaller than the sum of its proper divisors (281683321486062).

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

205042683220242 is a wasteful number, since it uses less digits than its factorization.

205042683220242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694539743.

The product of its (nonzero) digits is 737280, while the sum is 42.

The spelling of 205042683220242 in words is "two hundred five trillion, forty-two billion, six hundred eighty-three million, two hundred twenty thousand, two hundred forty-two".