20012220000 has 360 divisors, whose sum is σ = 72135927864. Its totient is φ = 5260032000.

The previous prime is 20012219989. The next prime is 20012220001. The reversal of 20012220000 is 2221002.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012220001) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 13139239 + ... + 13140761.

Almost surely, 2^20012220000 is an apocalyptic number.

20012220000 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 20012220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36067963932).

20012220000 is an abundant number, since it is smaller than the sum of its proper divisors (52123707864).

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

20012220000 is a wasteful number, since it uses less digits than its factorization.

20012220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632 (or 1606 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20012220000 its reverse (2221002), we get a palindrome (20014441002).

The spelling of 20012220000 in words is "twenty billion, twelve million, two hundred twenty thousand".