204020436 has 12 divisors (see below), whose sum is σ = 476047712. Its totient is φ = 68006808.

The previous prime is 204020429. The next prime is 204020437. The reversal of 204020436 is 634020402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204020437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8500840 + ... + 8500863.

Almost surely, 2^204020436 is an apocalyptic number.

It is an amenable number.

204020436 is an abundant number, since it is smaller than the sum of its proper divisors (272027276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204020436 is a wasteful number, since it uses less digits than its factorization.

204020436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17001710 (or 17001708 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 204020436 is about 14283.5722422649. The cubic root of 204020436 is about 588.6961882111.

Adding to 204020436 its reverse (634020402), we get a palindrome (838040838).

The spelling of 204020436 in words is "two hundred four million, twenty thousand, four hundred thirty-six".