203021154434 has 24 divisors (see below), whose sum is σ = 362891478348. Its totient is φ = 84886892160.

The previous prime is 203021154419. The next prime is 203021154443. The reversal of 203021154434 is 434451120302.

It can be written as a sum of positive squares in 2 ways, for example, as 202684542025 + 336612409 = 450205^2 + 18347^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 203021154397 and 203021154406.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25259939 + ... + 25267974.

Almost surely, 2^203021154434 is an apocalyptic number.

203021154434 is a deficient number, since it is larger than the sum of its proper divisors (159870323914).

203021154434 is a wasteful number, since it uses less digits than its factorization.

203021154434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50527970 (or 50527963 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 203021154434 its reverse (434451120302), we get a palindrome (637472274736).

The spelling of 203021154434 in words is "two hundred three billion, twenty-one million, one hundred fifty-four thousand, four hundred thirty-four".