205420036 has 6 divisors (see below), whose sum is σ = 359485070. Its totient is φ = 102710016.

The previous prime is 205420031. The next prime is 205420037. The reversal of 205420036 is 630024502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 155151936 + 50268100 = 12456^2 + 7090^2 .

It is a junction number, because it is equal to n+sod(n) for n = 205419989 and 205420016.

It is not an unprimeable number, because it can be changed into a prime (205420031) 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 as a sum of consecutive naturals, namely, 25677501 + ... + 25677508.

Almost surely, 2^205420036 is an apocalyptic number.

It is an amenable number.

205420036 is a deficient number, since it is larger than the sum of its proper divisors (154065034).

205420036 is a wasteful number, since it uses less digits than its factorization.

205420036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51355013 (or 51355011 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 205420036 is about 14332.4818506775. The cubic root of 205420036 is about 590.0392926048.

Adding to 205420036 its reverse (630024502), we get a palindrome (835444538).

The spelling of 205420036 in words is "two hundred five million, four hundred twenty thousand, thirty-six".