203434001422440 has 128 divisors (see below), whose sum is σ = 613789908076800. Its totient is φ = 53939144540160.

The previous prime is 203434001422433. The next prime is 203434001422451. The reversal of 203434001422440 is 44224100434302.

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 in 31 ways as a sum of consecutive naturals, for example, 114298056 + ... + 116064264.

It is an arithmetic number, because the mean of its divisors is an integer number (4795233656850).

Almost surely, 2^{203434001422440} is an apocalyptic number.

203434001422440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203434001422440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306894954038400).

203434001422440 is an abundant number, since it is smaller than the sum of its proper divisors (410355906654360).

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

203434001422440 is a wasteful number, since it uses less digits than its factorization.

203434001422440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771707 (or 1771703 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 33.

Adding to 203434001422440 its reverse (44224100434302), we get a palindrome (247658101856742).

The spelling of 203434001422440 in words is "two hundred three trillion, four hundred thirty-four billion, one million, four hundred twenty-two thousand, four hundred forty".