204243423400 has 48 divisors (see below), whose sum is σ = 475059594240. Its totient is φ = 81664056000.

The previous prime is 204243423383. The next prime is 204243423409. The reversal of 204243423400 is 4324342402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (204243423409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286425 + ... + 700375.

It is an arithmetic number, because the mean of its divisors is an integer number (9897074880).

Almost surely, 2^204243423400 is an apocalyptic number.

204243423400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204243423400 is an abundant number, since it is smaller than the sum of its proper divisors (270816170840).

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

204243423400 is a wasteful number, since it uses less digits than its factorization.

204243423400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416434 (or 416425 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 204243423400 its reverse (4324342402), we get a palindrome (208567765802).

The spelling of 204243423400 in words is "two hundred four billion, two hundred forty-three million, four hundred twenty-three thousand, four hundred".