21000210300 has 54 divisors (see below), whose sum is σ = 65823995328. Its totient is φ = 5600055840.

The previous prime is 21000210289. The next prime is 21000210317. The reversal of 21000210300 is 301200012.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11665884 + ... + 11667683.

Almost surely, 2^21000210300 is an apocalyptic number.

21000210300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21000210300 is an abundant number, since it is smaller than the sum of its proper divisors (44823785028).

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

21000210300 is a wasteful number, since it uses less digits than its factorization.

21000210300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23333587 (or 23333577 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 21000210300 its reverse (301200012), we get a palindrome (21301410312).

The spelling of 21000210300 in words is "twenty-one billion, two hundred ten thousand, three hundred".