204100220 has 12 divisors (see below), whose sum is σ = 428610504. Its totient is φ = 81640080.

The previous prime is 204100199. The next prime is 204100241. The reversal of 204100220 is 22001402.

It is an interprime number because it is at equal distance from previous prime (204100199) and next prime (204100241).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5102486 + ... + 5102525.

It is an arithmetic number, because the mean of its divisors is an integer number (35717542).

Almost surely, 2^204100220 is an apocalyptic number.

204100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204100220 is an abundant number, since it is smaller than the sum of its proper divisors (224510284).

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

204100220 is a wasteful number, since it uses less digits than its factorization.

204100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10205020 (or 10205018 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 204100220 is about 14286.3648280450. The cubic root of 204100220 is about 588.7729164978.

Adding to 204100220 its reverse (22001402), we get a palindrome (226101622).

The spelling of 204100220 in words is "two hundred four million, one hundred thousand, two hundred twenty".