21232352210 has 16 divisors (see below), whose sum is σ = 38221939800. Its totient is φ = 8492117376.

The previous prime is 21232352203. The next prime is 21232352221. The reversal of 21232352210 is 1225323212.

It can be written as a sum of positive squares in 4 ways, for example, as 4507913881 + 16724438329 = 67141^2 + 129323^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11396 + ... + 206384.

Almost surely, 2^21232352210 is an apocalyptic number.

21232352210 is a deficient number, since it is larger than the sum of its proper divisors (16989587590).

21232352210 is a wasteful number, since it uses less digits than its factorization.

21232352210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205885.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 21232352210 its reverse (1225323212), we get a palindrome (22457675422).

The spelling of 21232352210 in words is "twenty-one billion, two hundred thirty-two million, three hundred fifty-two thousand, two hundred ten".