21300200 has 24 divisors (see below), whose sum is σ = 49523430. Its totient is φ = 8520000.

The previous prime is 21300199. The next prime is 21300203. The reversal of 21300200 is 200312.

It can be written as a sum of positive squares in 3 ways, for example, as 20557156 + 743044 = 4534^2 + 862^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is not an unprimeable number, because it can be changed into a prime (21300203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53051 + ... + 53450.

Almost surely, 2^21300200 is an apocalyptic number.

21300200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300200 is an abundant number, since it is smaller than the sum of its proper divisors (28223230).

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

21300200 is a wasteful number, since it uses less digits than its factorization.

21300200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106517 (or 106508 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 21300200 is about 4615.2139712044. The cubic root of 21300200 is about 277.2008517777.

Adding to 21300200 its reverse (200312), we get a palindrome (21500512).

The spelling of 21300200 in words is "twenty-one million, three hundred thousand, two hundred".