204020424 has 64 divisors (see below), whose sum is σ = 585024000. Its totient is φ = 65810880.

The previous prime is 204020413. The next prime is 204020429. The reversal of 204020424 is 424020402.

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

It is a junction number, because it is equal to n+sod(n) for n = 204020397 and 204020406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204020429) 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 15 ways as a sum of consecutive naturals, for example, 8539 + ... + 21930.

It is an arithmetic number, because the mean of its divisors is an integer number (9141000).

Almost surely, 2^204020424 is an apocalyptic number.

204020424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

204020424 is an abundant number, since it is smaller than the sum of its proper divisors (381003576).

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

204020424 is a wasteful number, since it uses less digits than its factorization.

204020424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30515 (or 30505 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 204020424 is about 14283.5718222019. The cubic root of 204020424 is about 588.6961766692.

Adding to 204020424 its reverse (424020402), we get a palindrome (628040826).

The spelling of 204020424 in words is "two hundred four million, twenty thousand, four hundred twenty-four".