204423100 has 54 divisors (see below), whose sum is σ = 516034680. Its totient is φ = 70086240.

The previous prime is 204423073. The next prime is 204423101. The reversal of 204423100 is 1324402.

It is a super-2 number, since 2×204423100² = 83577607627220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204423101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15960 + ... + 25759.

Almost surely, 2^204423100 is an apocalyptic number.

204423100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204423100 is an abundant number, since it is smaller than the sum of its proper divisors (311611580).

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

204423100 is a wasteful number, since it uses less digits than its factorization.

204423100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41747 (or 41733 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 204423100 is about 14297.6606478123. The cubic root of 204423100 is about 589.0832262101.

Adding to 204423100 its reverse (1324402), we get a palindrome (205747502).

The spelling of 204423100 in words is "two hundred four million, four hundred twenty-three thousand, one hundred".