204426405 has 12 divisors (see below), whose sum is σ = 354339180. Its totient is φ = 109027392.

The previous prime is 204426371. The next prime is 204426419. The reversal of 204426405 is 504624402.

204426405 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 114896961 + 89529444 = 10719^2 + 9462^2 .

It is not a de Polignac number, because 204426405 - 2¹¹ = 204424357 is a prime.

It is a super-2 number, since 2×204426405² = 83580310122448050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2271360 + ... + 2271449.

It is an arithmetic number, because the mean of its divisors is an integer number (29528265).

Almost surely, 2^204426405 is an apocalyptic number.

It is an amenable number.

204426405 is a deficient number, since it is larger than the sum of its proper divisors (149912775).

204426405 is a wasteful number, since it uses less digits than its factorization.

204426405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4542820 (or 4542817 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 204426405 is about 14297.7762256933. The cubic root of 204426405 is about 589.0864008506.

The spelling of 204426405 in words is "two hundred four million, four hundred twenty-six thousand, four hundred five".