20312230320 has 120 divisors (see below), whose sum is σ = 68279754816. Its totient is φ = 5411472384.

The previous prime is 20312230319. The next prime is 20312230331. The reversal of 20312230320 is 2303221302.

It is a happy number.

20312230320 is a `hidden beast` number, since 2 + 0 + 312 + 2 + 30 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20312230293 and 20312230302.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 781372 + ... + 806948.

Almost surely, 2^20312230320 is an apocalyptic number.

20312230320 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 20312230320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34139877408).

20312230320 is an abundant number, since it is smaller than the sum of its proper divisors (47967524496).

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

20312230320 is a wasteful number, since it uses less digits than its factorization.

20312230320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26699 (or 26690 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20312230320 its reverse (2303221302), we get a palindrome (22615451622).

The spelling of 20312230320 in words is "twenty billion, three hundred twelve million, two hundred thirty thousand, three hundred twenty".