203434340545420 has 12 divisors (see below), whose sum is σ = 427212115145424. Its totient is φ = 81373736218160.

The previous prime is 203434340545393. The next prime is 203434340545453. The reversal of 203434340545420 is 24545043434302.

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, 5085858513616 + ... + 5085858513655.

It is an arithmetic number, because the mean of its divisors is an integer number (35601009595452).

Almost surely, 2^{203434340545420} is an apocalyptic number.

203434340545420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203434340545420 is an abundant number, since it is smaller than the sum of its proper divisors (223777774600004).

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

203434340545420 is a wasteful number, since it uses less digits than its factorization.

203434340545420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10171717027280 (or 10171717027278 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 43.

Adding to 203434340545420 its reverse (24545043434302), we get a palindrome (227979383979722).

The spelling of 203434340545420 in words is "two hundred three trillion, four hundred thirty-four billion, three hundred forty million, five hundred forty-five thousand, four hundred twenty".