205643632 has 40 divisors (see below), whose sum is σ = 410594256. Its totient is φ = 99703296.

The previous prime is 205643609. The next prime is 205643639. The reversal of 205643632 is 236346502.

It is a happy number.

205643632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 205643594 and 205643603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205643639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332988 + ... + 333604.

Almost surely, 2^205643632 is an apocalyptic number.

It is an amenable number.

205643632 is a deficient number, since it is larger than the sum of its proper divisors (204950624).

205643632 is a wasteful number, since it uses less digits than its factorization.

205643632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225 (or 1219 counting only the distinct ones).

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

The square root of 205643632 is about 14340.2800530534. The cubic root of 205643632 is about 590.2532973488.

The spelling of 205643632 in words is "two hundred five million, six hundred forty-three thousand, six hundred thirty-two".