204000381 has 12 divisors (see below), whose sum is σ = 317334108. Its totient is φ = 125538624.

The previous prime is 204000361. The next prime is 204000383. The reversal of 204000381 is 183000402.

It is a happy number.

204000381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 113103225 + 90897156 = 10635^2 + 9534^2 .

It is not a de Polignac number, because 204000381 - 2¹⁸ = 203738237 is a prime.

It is a super-2 number, since 2×204000381² = 83232310896290322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204000383) 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, 871680 + ... + 871913.

It is an arithmetic number, because the mean of its divisors is an integer number (26444509).

Almost surely, 2^204000381 is an apocalyptic number.

It is an amenable number.

204000381 is a deficient number, since it is larger than the sum of its proper divisors (113333727).

204000381 is a wasteful number, since it uses less digits than its factorization.

204000381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743612 (or 1743609 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 204000381 is about 14282.8701947473. The cubic root of 204000381 is about 588.6768981681.

Adding to 204000381 its reverse (183000402), we get a palindrome (387000783).

The spelling of 204000381 in words is "two hundred four million, three hundred eighty-one", and thus it is an aban number.