20303405434520 has 64 divisors (see below), whose sum is σ = 49325164600320. Its totient is φ = 7477068455424.

The previous prime is 20303405434519. The next prime is 20303405434523. The reversal of 20303405434520 is 2543450430302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303405434523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50773439 + ... + 51171758.

It is an arithmetic number, because the mean of its divisors is an integer number (770705696880).

Almost surely, 2^{20303405434520} is an apocalyptic number.

20303405434520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20303405434520 is an abundant number, since it is smaller than the sum of its proper divisors (29021759165800).

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

20303405434520 is a wasteful number, since it uses less digits than its factorization.

20303405434520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101945604 (or 101945600 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 35.

Adding to 20303405434520 its reverse (2543450430302), we get a palindrome (22846855864822).

The spelling of 20303405434520 in words is "twenty trillion, three hundred three billion, four hundred five million, four hundred thirty-four thousand, five hundred twenty".