204122420 has 12 divisors (see below), whose sum is σ = 428657124. Its totient is φ = 81648960.

The previous prime is 204122411. The next prime is 204122423. The reversal of 204122420 is 24221402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36264484 + 167857936 = 6022^2 + 12956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204122423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5103041 + ... + 5103080.

It is an arithmetic number, because the mean of its divisors is an integer number (35721427).

Almost surely, 2^204122420 is an apocalyptic number.

204122420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204122420 is an abundant number, since it is smaller than the sum of its proper divisors (224534704).

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

204122420 is a wasteful number, since it uses less digits than its factorization.

204122420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10206130 (or 10206128 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 204122420 is about 14287.1417715371. The cubic root of 204122420 is about 588.7942626856.

Adding to 204122420 its reverse (24221402), we get a palindrome (228343822).

The spelling of 204122420 in words is "two hundred four million, one hundred twenty-two thousand, four hundred twenty".