203421304434 has 8 divisors (see below), whose sum is σ = 406842608880. Its totient is φ = 67807101476.

The previous prime is 203421304409. The next prime is 203421304447. The reversal of 203421304434 is 434403124302.

It is a happy number.

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

203421304434 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16951775364 + ... + 16951775375.

It is an arithmetic number, because the mean of its divisors is an integer number (50855326110).

Almost surely, 2^203421304434 is an apocalyptic number.

203421304434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

203421304434 is a wasteful number, since it uses less digits than its factorization.

203421304434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33903550744.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 203421304434 its reverse (434403124302), we get a palindrome (637824428736).

The spelling of 203421304434 in words is "two hundred three billion, four hundred twenty-one million, three hundred four thousand, four hundred thirty-four".