204012420 has 24 divisors (see below), whose sum is σ = 571234944. Its totient is φ = 54403296.

The previous prime is 204012407. The next prime is 204012421. The reversal of 204012420 is 24210402.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 204012420.

It is not an unprimeable number, because it can be changed into a prime (204012421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700044 + ... + 1700163.

It is an arithmetic number, because the mean of its divisors is an integer number (23801456).

Almost surely, 2^204012420 is an apocalyptic number.

204012420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204012420 is an abundant number, since it is smaller than the sum of its proper divisors (367222524).

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

204012420 is a wasteful number, since it uses less digits than its factorization.

204012420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400219 (or 3400217 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 204012420 is about 14283.2916374343. The cubic root of 204012420 is about 588.6884781167.

Adding to 204012420 its reverse (24210402), we get a palindrome (228222822).

The spelling of 204012420 in words is "two hundred four million, twelve thousand, four hundred twenty".