20213320212 has 72 divisors (see below), whose sum is σ = 54123130152. Its totient is φ = 6338764800.

The previous prime is 20213320199. The next prime is 20213320241. The reversal of 20213320212 is 21202331202.

It can be written as a sum of positive squares in 4 ways, for example, as 10537843716 + 9675476496 = 102654^2 + 98364^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1855662 + ... + 1866522.

It is an arithmetic number, because the mean of its divisors is an integer number (751710141).

Almost surely, 2^20213320212 is an apocalyptic number.

It is an amenable number.

20213320212 is an abundant number, since it is smaller than the sum of its proper divisors (33909809940).

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

20213320212 is a wasteful number, since it uses less digits than its factorization.

20213320212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13929 (or 13924 counting only the distinct ones).

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

Adding to 20213320212 its reverse (21202331202), we get a palindrome (41415651414).

It can be divided in two parts, 2021 and 3320212, that added together give a palindrome (3322233).

The spelling of 20213320212 in words is "twenty billion, two hundred thirteen million, three hundred twenty thousand, two hundred twelve".