203820434 has 8 divisors (see below), whose sum is σ = 319023360. Its totient is φ = 97479316.

The previous prime is 203820433. The next prime is 203820437. The reversal of 203820434 is 434028302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (203820433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215394 + ... + 2215485.

It is an arithmetic number, because the mean of its divisors is an integer number (39877920).

Almost surely, 2^203820434 is an apocalyptic number.

203820434 is a deficient number, since it is larger than the sum of its proper divisors (115202926).

203820434 is a wasteful number, since it uses less digits than its factorization.

203820434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430904.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 203820434 is about 14276.5694058482. The cubic root of 203820434 is about 588.5037582890.

Adding to 203820434 its reverse (434028302), we get a palindrome (637848736).

The spelling of 203820434 in words is "two hundred three million, eight hundred twenty thousand, four hundred thirty-four".