205540136023012 has 24 divisors (see below), whose sum is σ = 432716075839040. Its totient is φ = 83452386054240.

The previous prime is 205540136023003. The next prime is 205540136023091. The reversal of 205540136023012 is 210320631045502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193176819039 + ... + 193176820102.

Almost surely, 2^{205540136023012} is an apocalyptic number.

It is an amenable number.

205540136023012 is an abundant number, since it is smaller than the sum of its proper divisors (227175939816028).

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

205540136023012 is a wasteful number, since it uses less digits than its factorization.

205540136023012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386353639171 (or 386353639169 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 205540136023012 its reverse (210320631045502), we get a palindrome (415860767068514).

The spelling of 205540136023012 in words is "two hundred five trillion, five hundred forty billion, one hundred thirty-six million, twenty-three thousand, twelve".