203034343421 has 24 divisors (see below), whose sum is σ = 254387388024. Its totient is φ = 160619397120.

The previous prime is 203034343313. The next prime is 203034343433. The reversal of 203034343421 is 124343430302.

It can be written as a sum of positive squares in 4 ways, for example, as 52091215225 + 150943128196 = 228235^2 + 388514^2 .

It is not a de Polignac number, because 203034343421 - 2³⁰ = 201960601597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203034343021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5404061 + ... + 5441501.

It is an arithmetic number, because the mean of its divisors is an integer number (10599474501).

Almost surely, 2^203034343421 is an apocalyptic number.

It is an amenable number.

203034343421 is a deficient number, since it is larger than the sum of its proper divisors (51353044603).

203034343421 is a wasteful number, since it uses less digits than its factorization.

203034343421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45981 (or 45974 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 203034343421 its reverse (124343430302), we get a palindrome (327377773723).

The spelling of 203034343421 in words is "two hundred three billion, thirty-four million, three hundred forty-three thousand, four hundred twenty-one".