20303144520 has 64 divisors (see below), whose sum is σ = 61225096320. Its totient is φ = 5386113024.

The previous prime is 20303144509. The next prime is 20303144539. The reversal of 20303144520 is 2544130302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415164 + ... + 461483.

It is an arithmetic number, because the mean of its divisors is an integer number (956642130).

Almost surely, 2^20303144520 is an apocalyptic number.

20303144520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20303144520 is an abundant number, since it is smaller than the sum of its proper divisors (40921951800).

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

20303144520 is a wasteful number, since it uses less digits than its factorization.

20303144520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876854 (or 876850 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 20303144520 its reverse (2544130302), we get a palindrome (22847274822).

The spelling of 20303144520 in words is "twenty billion, three hundred three million, one hundred forty-four thousand, five hundred twenty".