204000420 has 96 divisors (see below), whose sum is σ = 630241920. Its totient is φ = 48983040.

The previous prime is 204000383. The next prime is 204000427. The reversal of 204000420 is 24000402.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 204000396 and 204000405.

It is not an unprimeable number, because it can be changed into a prime (204000427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28791 + ... + 35169.

It is an arithmetic number, because the mean of its divisors is an integer number (6565020).

Almost surely, 2^204000420 is an apocalyptic number.

204000420 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 204000420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315120960).

204000420 is an abundant number, since it is smaller than the sum of its proper divisors (426241500).

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

204000420 is a wasteful number, since it uses less digits than its factorization.

204000420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6445 (or 6443 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 204000420 is about 14282.8715600190. The cubic root of 204000420 is about 588.6769356818.

Adding to 204000420 its reverse (24000402), we get a palindrome (228000822).

The spelling of 204000420 in words is "two hundred four million, four hundred twenty", and thus it is an aban number.