21020300210 has 128 divisors (see below), whose sum is σ = 50063892480. Its totient is φ = 6168109824.

The previous prime is 21020300167. The next prime is 21020300243. The reversal of 21020300210 is 1200302012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21020300191 and 21020300200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 799697 + ... + 825563.

It is an arithmetic number, because the mean of its divisors is an integer number (391124160).

Almost surely, 2^21020300210 is an apocalyptic number.

21020300210 is an abundant number, since it is smaller than the sum of its proper divisors (29043592270).

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

21020300210 is a wasteful number, since it uses less digits than its factorization.

21020300210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25960.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21020300210 its reverse (1200302012), we get a palindrome (22220602222).

The spelling of 21020300210 in words is "twenty-one billion, twenty million, three hundred thousand, two hundred ten".