20011223320 has 64 divisors (see below), whose sum is σ = 51703660800. Its totient is φ = 6893815680.

The previous prime is 20011223269. The next prime is 20011223321. The reversal of 20011223320 is 2332211002.

It is a junction number, because it is equal to n+sod(n) for n = 20011223294 and 20011223303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011223321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1188484 + ... + 1205203.

It is an arithmetic number, because the mean of its divisors is an integer number (807869700).

Almost surely, 2^20011223320 is an apocalyptic number.

20011223320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011223320 is an abundant number, since it is smaller than the sum of its proper divisors (31692437480).

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

20011223320 is a wasteful number, since it uses less digits than its factorization.

20011223320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393728 (or 2393724 counting only the distinct ones).

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

Adding to 20011223320 its reverse (2332211002), we get a palindrome (22343434322).

The spelling of 20011223320 in words is "twenty billion, eleven million, two hundred twenty-three thousand, three hundred twenty".