205363642 has 16 divisors (see below), whose sum is σ = 350661312. Its totient is φ = 89288320.

The previous prime is 205363597. The next prime is 205363667. The reversal of 205363642 is 246363502.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202423 + ... + 203434.

It is an arithmetic number, because the mean of its divisors is an integer number (21916332).

Almost surely, 2^205363642 is an apocalyptic number.

205363642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

205363642 is a deficient number, since it is larger than the sum of its proper divisors (145297670).

205363642 is a wasteful number, since it uses less digits than its factorization.

205363642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405893.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 205363642 is about 14330.5143662047. The cubic root of 205363642 is about 589.9852931314.

The spelling of 205363642 in words is "two hundred five million, three hundred sixty-three thousand, six hundred forty-two".