2021723300 has 72 divisors (see below), whose sum is σ = 4663529640. Its totient is φ = 758118400.

The previous prime is 2021723293. The next prime is 2021723357. The reversal of 2021723300 is 33271202.

It can be written as a sum of positive squares in 12 ways, for example, as 413552896 + 1608170404 = 20336^2 + 40102^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 455090 + ... + 459510.

It is an arithmetic number, because the mean of its divisors is an integer number (64771245).

Almost surely, 2^2021723300 is an apocalyptic number.

2021723300 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 2021723300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2331764820).

2021723300 is an abundant number, since it is smaller than the sum of its proper divisors (2641806340).

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

2021723300 is a wasteful number, since it uses less digits than its factorization.

2021723300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721 (or 4714 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 2021723300 is about 44963.5774822244. The cubic root of 2021723300 is about 1264.4662404682.

Adding to 2021723300 its reverse (33271202), we get a palindrome (2054994502).

The spelling of 2021723300 in words is "two billion, twenty-one million, seven hundred twenty-three thousand, three hundred".