204310421100 has 108 divisors (see below), whose sum is σ = 641886729120. Its totient is φ = 54356265600.

The previous prime is 204310420997. The next prime is 204310421113. The reversal of 204310421100 is 1124013402.

204310421100 is a `hidden beast` number, since 20 + 431 + 0 + 4 + 211 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 124546 + ... + 651254.

It is an arithmetic number, because the mean of its divisors is an integer number (5943395640).

Almost surely, 2^204310421100 is an apocalyptic number.

204310421100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204310421100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320943364560).

204310421100 is an abundant number, since it is smaller than the sum of its proper divisors (437576308020).

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

204310421100 is a wasteful number, since it uses less digits than its factorization.

204310421100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527160 (or 527150 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 204310421100 its reverse (1124013402), we get a palindrome (205434434502).

The spelling of 204310421100 in words is "two hundred four billion, three hundred ten million, four hundred twenty-one thousand, one hundred".