20212003320 has 128 divisors (see below), whose sum is σ = 62650022400. Its totient is φ = 5212601856.

The previous prime is 20212003121. The next prime is 20212003397. The reversal of 20212003320 is 2330021202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20212003320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 727851 + ... + 755109.

It is an arithmetic number, because the mean of its divisors is an integer number (489453300).

Almost surely, 2^20212003320 is an apocalyptic number.

20212003320 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 20212003320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31325011200).

20212003320 is an abundant number, since it is smaller than the sum of its proper divisors (42438019080).

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

20212003320 is a wasteful number, since it uses less digits than its factorization.

20212003320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27477 (or 27473 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20212003320 its reverse (2330021202), we get a palindrome (22542024522).

The spelling of 20212003320 in words is "twenty billion, two hundred twelve million, three thousand, three hundred twenty".