20021011300 has 72 divisors (see below), whose sum is σ = 45680904360. Its totient is φ = 7605427200.

The previous prime is 20021011291. The next prime is 20021011357. The reversal of 20021011300 is 311012002.

It can be written as a sum of positive squares in 12 ways, for example, as 16833505536 + 3187505764 = 129744^2 + 56458^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 120312 + ... + 233488.

It is an arithmetic number, because the mean of its divisors is an integer number (634457005).

Almost surely, 2^20021011300 is an apocalyptic number.

20021011300 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 20021011300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22840452180).

20021011300 is an abundant number, since it is smaller than the sum of its proper divisors (25659893060).

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

20021011300 is a wasteful number, since it uses less digits than its factorization.

20021011300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113281 (or 113274 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20021011300 its reverse (311012002), we get a palindrome (20332023302).

The spelling of 20021011300 in words is "twenty billion, twenty-one million, eleven thousand, three hundred".