20212213320 has 96 divisors (see below), whose sum is σ = 70742763000. Its totient is φ = 4975312896.

The previous prime is 20212213313. The next prime is 20212213321. The reversal of 20212213320 is 2331221202.

It can be written as a sum of positive squares in 4 ways, for example, as 13269657636 + 6942555684 = 115194^2 + 83322^2 .

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 = 20212213293 and 20212213302.

It is not an unprimeable number, because it can be changed into a prime (20212213321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2154745 + ... + 2164104.

Almost surely, 2^20212213320 is an apocalyptic number.

20212213320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212213320 is an abundant number, since it is smaller than the sum of its proper divisors (50530549680).

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

20212213320 is a wasteful number, since it uses less digits than its factorization.

20212213320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4318879 (or 4318872 counting only the distinct ones).

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

Adding to 20212213320 its reverse (2331221202), we get a palindrome (22543434522).

The spelling of 20212213320 in words is "twenty billion, two hundred twelve million, two hundred thirteen thousand, three hundred twenty".