203434120534 has 4 divisors (see below), whose sum is σ = 305151180804. Its totient is φ = 101717060266.

The previous prime is 203434120523. The next prime is 203434120553. The reversal of 203434120534 is 435021434302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 203434120496 and 203434120505.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 50858530132 + ... + 50858530135.

It is an arithmetic number, because the mean of its divisors is an integer number (76287795201).

Almost surely, 2^203434120534 is an apocalyptic number.

203434120534 is a deficient number, since it is larger than the sum of its proper divisors (101717060270).

203434120534 is a wasteful number, since it uses less digits than its factorization.

203434120534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101717060269.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 203434120534 its reverse (435021434302), we get a palindrome (638455554836).

The spelling of 203434120534 in words is "two hundred three billion, four hundred thirty-four million, one hundred twenty thousand, five hundred thirty-four".