204021400 has 48 divisors (see below), whose sum is σ = 517478040. Its totient is φ = 74188800.

The previous prime is 204021353. The next prime is 204021401. The reversal of 204021400 is 4120402.

204021400 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204021401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44169 + ... + 48568.

Almost surely, 2^204021400 is an apocalyptic number.

204021400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204021400 is an abundant number, since it is smaller than the sum of its proper divisors (313456640).

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

204021400 is a wasteful number, since it uses less digits than its factorization.

204021400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92764 (or 92755 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 204021400 is about 14283.6059872849. The cubic root of 204021400 is about 588.6971154094.

Adding to 204021400 its reverse (4120402), we get a palindrome (208141802).

The spelling of 204021400 in words is "two hundred four million, twenty-one thousand, four hundred".