205400404142 has 32 divisors (see below), whose sum is σ = 322866238464. Its totient is φ = 97817288800.

The previous prime is 205400404051. The next prime is 205400404171. The reversal of 205400404142 is 241404004502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10402283 + ... + 10422009.

It is an arithmetic number, because the mean of its divisors is an integer number (10089569952).

Almost surely, 2^205400404142 is an apocalyptic number.

205400404142 is a deficient number, since it is larger than the sum of its proper divisors (117465834322).

205400404142 is a wasteful number, since it uses less digits than its factorization.

205400404142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20704.

The product of its (nonzero) digits is 5120, while the sum is 26.

Adding to 205400404142 its reverse (241404004502), we get a palindrome (446804408644).

The spelling of 205400404142 in words is "two hundred five billion, four hundred million, four hundred four thousand, one hundred forty-two".