21202068210 has 16 divisors (see below), whose sum is σ = 50884963776. Its totient is φ = 5653884848.

The previous prime is 21202068203. The next prime is 21202068253. The reversal of 21202068210 is 1286020212.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353367774 + ... + 353367833.

It is an arithmetic number, because the mean of its divisors is an integer number (3180310236).

Almost surely, 2^21202068210 is an apocalyptic number.

21202068210 is an abundant number, since it is smaller than the sum of its proper divisors (29682895566).

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

21202068210 is a wasteful number, since it uses less digits than its factorization.

21202068210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706735617.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 21202068210 its reverse (1286020212), we get a palindrome (22488088422).

The spelling of 21202068210 in words is "twenty-one billion, two hundred two million, sixty-eight thousand, two hundred ten".