203430004421 has 16 divisors (see below), whose sum is σ = 232967899008. Its totient is φ = 174011544000.

The previous prime is 203430004411. The next prime is 203430004429. The reversal of 203430004421 is 124400034302.

It is not a de Polignac number, because 203430004421 - 2¹⁰ = 203430003397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203430004429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8442731 + ... + 8466791.

It is an arithmetic number, because the mean of its divisors is an integer number (14560493688).

Almost surely, 2^203430004421 is an apocalyptic number.

It is an amenable number.

203430004421 is a deficient number, since it is larger than the sum of its proper divisors (29537894587).

203430004421 is a wasteful number, since it uses less digits than its factorization.

203430004421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26492.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 203430004421 its reverse (124400034302), we get a palindrome (327830038723).

The spelling of 203430004421 in words is "two hundred three billion, four hundred thirty million, four thousand, four hundred twenty-one".