23221100320 has 72 divisors (see below), whose sum is σ = 60300546012. Its totient is φ = 8444029440.

The previous prime is 23221100297. The next prime is 23221100323. The reversal of 23221100320 is 2300112232.

It can be written as a sum of positive squares in 2 ways, for example, as 21506809104 + 1714291216 = 146652^2 + 41404^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 23221100294 and 23221100303.

It is not an unprimeable number, because it can be changed into a prime (23221100323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 580359 + ... + 619078.

Almost surely, 2^23221100320 is an apocalyptic number.

23221100320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23221100320 is an abundant number, since it is smaller than the sum of its proper divisors (37079445692).

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

23221100320 is a wasteful number, since it uses less digits than its factorization.

23221100320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199474 (or 1199455 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 23221100320 its reverse (2300112232), we get a palindrome (25521212552).

The spelling of 23221100320 in words is "twenty-three billion, two hundred twenty-one million, one hundred thousand, three hundred twenty".