203434340545440 has 144 divisors (see below), whose sum is σ = 694323474245856. Its totient is φ = 54241047129600.

The previous prime is 203434340545393. The next prime is 203434340545453. The reversal of 203434340545440 is 44545043434302.

203434340545440 is a `hidden beast` number, since 2 + 0 + 3 + 4 + 34 + 34 + 0 + 545 + 4 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 921966 + ... + 20192045.

It is an arithmetic number, because the mean of its divisors is an integer number (4821690793374).

Almost surely, 2^{203434340545440} is an apocalyptic number.

203434340545440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203434340545440 is an abundant number, since it is smaller than the sum of its proper divisors (490889133700416).

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

203434340545440 is a wasteful number, since it uses less digits than its factorization.

203434340545440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21120723 (or 21120712 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 45.

Adding to 203434340545440 its reverse (44545043434302), we get a palindrome (247979383979742).

The spelling of 203434340545440 in words is "two hundred three trillion, four hundred thirty-four billion, three hundred forty million, five hundred forty-five thousand, four hundred forty".