204081900 has 72 divisors (see below), whose sum is σ = 644167104. Its totient is φ = 49473600.

The previous prime is 204081877. The next prime is 204081929. The reversal of 204081900 is 9180402.

It is a super-2 number, since 2×204081900² = 83298843815220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27622 + ... + 34221.

Almost surely, 2^204081900 is an apocalyptic number.

204081900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204081900 is an abundant number, since it is smaller than the sum of its proper divisors (440085204).

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

204081900 is a wasteful number, since it uses less digits than its factorization.

204081900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61871 (or 61864 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 204081900 is about 14285.7236428541. The cubic root of 204081900 is about 588.7552999194.

The spelling of 204081900 in words is "two hundred four million, eighty-one thousand, nine hundred".