205805426 has 8 divisors (see below), whose sum is σ = 322130304. Its totient is φ = 98428660.

The previous prime is 205805423. The next prime is 205805443. The reversal of 205805426 is 624508502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 205805392 and 205805401.

It is not an unprimeable number, because it can be changed into a prime (205805423) by changing a digit.

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, 2236970 + ... + 2237061.

It is an arithmetic number, because the mean of its divisors is an integer number (40266288).

Almost surely, 2^205805426 is an apocalyptic number.

205805426 is a deficient number, since it is larger than the sum of its proper divisors (116324878).

205805426 is a wasteful number, since it uses less digits than its factorization.

205805426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4474056.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 205805426 is about 14345.9201865896. The cubic root of 205805426 is about 590.4080544022.

The spelling of 205805426 in words is "two hundred five million, eight hundred five thousand, four hundred twenty-six".