2001721300 has 36 divisors (see below), whose sum is σ = 4350756256. Its totient is φ = 799394400.

The previous prime is 2001721291. The next prime is 2001721301. The reversal of 2001721300 is 31271002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001721301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47239 + ... + 78961.

Almost surely, 2^2001721300 is an apocalyptic number.

2001721300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001721300 is an abundant number, since it is smaller than the sum of its proper divisors (2349034956).

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

2001721300 is a wasteful number, since it uses less digits than its factorization.

2001721300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32368 (or 32361 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 2001721300 is about 44740.6001300832. The cubic root of 2001721300 is about 1260.2823966009.

Adding to 2001721300 its reverse (31271002), we get a palindrome (2032992302).

The spelling of 2001721300 in words is "two billion, one million, seven hundred twenty-one thousand, three hundred".