23221210320 has 480 divisors, whose sum is σ = 101460363264. Its totient is φ = 4615142400.

The previous prime is 23221210289. The next prime is 23221210349. The reversal of 23221210320 is 2301212232.

23221210320 is a `hidden beast` number, since 2 + 322 + 1 + 21 + 0 + 320 = 666.

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 = 23221210293 and 23221210302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1266015 + ... + 1284225.

Almost surely, 2^23221210320 is an apocalyptic number.

23221210320 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 23221210320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50730181632).

23221210320 is an abundant number, since it is smaller than the sum of its proper divisors (78239152944).

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

23221210320 is a wasteful number, since it uses less digits than its factorization.

23221210320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18271 (or 18262 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 23221210320 its reverse (2301212232), we get a palindrome (25522422552).

The spelling of 23221210320 in words is "twenty-three billion, two hundred twenty-one million, two hundred ten thousand, three hundred twenty".