204810421011 has 16 divisors (see below), whose sum is σ = 312564242688. Its totient is φ = 116857461600.

The previous prime is 204810421003. The next prime is 204810421027. The reversal of 204810421011 is 110124018402.

It is not a de Polignac number, because 204810421011 - 2³ = 204810421003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204810429011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7363485 + ... + 7391246.

It is an arithmetic number, because the mean of its divisors is an integer number (19535265168).

Almost surely, 2^204810421011 is an apocalyptic number.

204810421011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

204810421011 is a deficient number, since it is larger than the sum of its proper divisors (107753821677).

204810421011 is a wasteful number, since it uses less digits than its factorization.

204810421011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14755402.

The product of its (nonzero) digits is 512, while the sum is 24.

Adding to 204810421011 its reverse (110124018402), we get a palindrome (314934439413).

The spelling of 204810421011 in words is "two hundred four billion, eight hundred ten million, four hundred twenty-one thousand, eleven".