205540036 has 24 divisors (see below), whose sum is σ = 387825984. Its totient is φ = 94751520.

The previous prime is 205540019. The next prime is 205540057. The reversal of 205540036 is 630045502.

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, 54921 + ... + 58543.

It is an arithmetic number, because the mean of its divisors is an integer number (16159416).

Almost surely, 2^205540036 is an apocalyptic number.

205540036 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

205540036 is a deficient number, since it is larger than the sum of its proper divisors (182285948).

205540036 is a wasteful number, since it uses less digits than its factorization.

205540036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4731 (or 4729 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 205540036 is about 14336.6675346818. The cubic root of 205540036 is about 590.1541644444.

Adding to 205540036 its reverse (630045502), we get a palindrome (835585538).

The spelling of 205540036 in words is "two hundred five million, five hundred forty thousand, thirty-six".