23221245320 has 256 divisors, whose sum is σ = 65810465280. Its totient is φ = 7179264000.

The previous prime is 23221245293. The next prime is 23221245329. The reversal of 23221245320 is 2354212232.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 23221245320.

It is not an unprimeable number, because it can be changed into a prime (23221245329) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30513740 + ... + 30514500.

It is an arithmetic number, because the mean of its divisors is an integer number (257072130).

Almost surely, 2^23221245320 is an apocalyptic number.

23221245320 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 23221245320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32905232640).

23221245320 is an abundant number, since it is smaller than the sum of its proper divisors (42589219960).

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

23221245320 is a wasteful number, since it uses less digits than its factorization.

23221245320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 972 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 23221245320 its reverse (2354212232), we get a palindrome (25575457552).

The spelling of 23221245320 in words is "twenty-three billion, two hundred twenty-one million, two hundred forty-five thousand, three hundred twenty".