204400432323420 has 24 divisors (see below), whose sum is σ = 572321210505744. Its totient is φ = 54506781952896.

The previous prime is 204400432323379. The next prime is 204400432323427. The reversal of 204400432323420 is 24323234004402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204400432323427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1703336935969 + ... + 1703336936088.

It is an arithmetic number, because the mean of its divisors is an integer number (23846717104406).

Almost surely, 2^{204400432323420} is an apocalyptic number.

204400432323420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204400432323420 is an abundant number, since it is smaller than the sum of its proper divisors (367920778182324).

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

204400432323420 is a wasteful number, since it uses less digits than its factorization.

204400432323420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406673872069 (or 3406673872067 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 33.

Adding to 204400432323420 its reverse (24323234004402), we get a palindrome (228723666327822).

The spelling of 204400432323420 in words is "two hundred four trillion, four hundred billion, four hundred thirty-two million, three hundred twenty-three thousand, four hundred twenty".