203205455042 has 16 divisors (see below), whose sum is σ = 306114243864. Its totient is φ = 101167488000.

The previous prime is 203205455029. The next prime is 203205455059. The reversal of 203205455042 is 240554502302.

It can be written as a sum of positive squares in 4 ways, for example, as 173314848721 + 29890606321 = 416311^2 + 172889^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4198742 + ... + 4246862.

Almost surely, 2^203205455042 is an apocalyptic number.

203205455042 is a deficient number, since it is larger than the sum of its proper divisors (102908788822).

203205455042 is a wasteful number, since it uses less digits than its factorization.

203205455042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57125.

The product of its (nonzero) digits is 48000, while the sum is 32.

Adding to 203205455042 its reverse (240554502302), we get a palindrome (443759957344).

The spelling of 203205455042 in words is "two hundred three billion, two hundred five million, four hundred fifty-five thousand, forty-two".