23030320520 has 64 divisors (see below), whose sum is σ = 52218270000. Its totient is φ = 9141219328.

The previous prime is 23030320517. The next prime is 23030320543. The reversal of 23030320520 is 2502303032.

It can be written as a sum of positive squares in 8 ways, for example, as 9290260996 + 13740059524 = 96386^2 + 117218^2 .

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 = 23030320492 and 23030320501.

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, 3934556 + ... + 3940404.

Almost surely, 2^23030320520 is an apocalyptic number.

23030320520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23030320520 is an abundant number, since it is smaller than the sum of its proper divisors (29187949480).

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

23030320520 is a wasteful number, since it uses less digits than its factorization.

23030320520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6602 (or 6598 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 20.

Adding to 23030320520 its reverse (2502303032), we get a palindrome (25532623552).

The spelling of 23030320520 in words is "twenty-three billion, thirty million, three hundred twenty thousand, five hundred twenty".