204120443420 has 48 divisors (see below), whose sum is σ = 443517228000. Its totient is φ = 78817939200.

The previous prime is 204120443377. The next prime is 204120443431. The reversal of 204120443420 is 24344021402.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 204120443420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3363506 + ... + 3423654.

It is an arithmetic number, because the mean of its divisors is an integer number (9239942250).

Almost surely, 2^204120443420 is an apocalyptic number.

204120443420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204120443420 is an abundant number, since it is smaller than the sum of its proper divisors (239396784580).

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

204120443420 is a wasteful number, since it uses less digits than its factorization.

204120443420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66038 (or 66036 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 204120443420 its reverse (24344021402), we get a palindrome (228464464822).

The spelling of 204120443420 in words is "two hundred four billion, one hundred twenty million, four hundred forty-three thousand, four hundred twenty".