20310304520 has 32 divisors (see below), whose sum is σ = 49852566720. Its totient is φ = 7385565120.

The previous prime is 20310304499. The next prime is 20310304559. The reversal of 20310304520 is 2540301302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20310304492 and 20310304501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23079452 + ... + 23080331.

It is an arithmetic number, because the mean of its divisors is an integer number (1557892710).

Almost surely, 2^20310304520 is an apocalyptic number.

20310304520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20310304520 is an abundant number, since it is smaller than the sum of its proper divisors (29542262200).

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

20310304520 is a wasteful number, since it uses less digits than its factorization.

20310304520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46159805 (or 46159801 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 20310304520 its reverse (2540301302), we get a palindrome (22850605822).

The spelling of 20310304520 in words is "twenty billion, three hundred ten million, three hundred four thousand, five hundred twenty".