204424020020 has 96 divisors (see below), whose sum is σ = 473208293376. Its totient is φ = 73561116800.

The previous prime is 204424020013. The next prime is 204424020091. The reversal of 204424020020 is 20020424402.

It is a super-2 number, since 2×204424020020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 204424019974 and 204424020001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24265529 + ... + 24273951.

It is an arithmetic number, because the mean of its divisors is an integer number (4929253056).

Almost surely, 2^204424020020 is an apocalyptic number.

204424020020 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 204424020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236604146688).

204424020020 is an abundant number, since it is smaller than the sum of its proper divisors (268784273356).

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

204424020020 is a wasteful number, since it uses less digits than its factorization.

204424020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9581 (or 9579 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 204424020020 its reverse (20020424402), we get a palindrome (224444444422).

The spelling of 204424020020 in words is "two hundred four billion, four hundred twenty-four million, twenty thousand, twenty".