204336381 has 4 divisors (see below), whose sum is σ = 272448512. Its totient is φ = 136224252.

The previous prime is 204336329. The next prime is 204336383. The reversal of 204336381 is 183633402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 204336381 - 2¹⁹ = 203812093 is a prime.

It is a super-2 number, since 2×204336381² = 83506713200354322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204336383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34056061 + ... + 34056066.

It is an arithmetic number, because the mean of its divisors is an integer number (68112128).

Almost surely, 2^204336381 is an apocalyptic number.

It is an amenable number.

204336381 is a deficient number, since it is larger than the sum of its proper divisors (68112131).

204336381 is an equidigital number, since it uses as much as digits as its factorization.

204336381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68112130.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 204336381 is about 14294.6276971455. The cubic root of 204336381 is about 588.9999154466. Note that the first 4 decimals are identical.

Adding to 204336381 its reverse (183633402), we get a palindrome (387969783).

The spelling of 204336381 in words is "two hundred four million, three hundred thirty-six thousand, three hundred eighty-one".