21423302210 has 8 divisors (see below), whose sum is σ = 38561943996. Its totient is φ = 8569320880.

The previous prime is 21423302209. The next prime is 21423302273. The reversal of 21423302210 is 1220332412.

It can be written as a sum of positive squares in 2 ways, for example, as 21341995921 + 81306289 = 146089^2 + 9017^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1071165101 + ... + 1071165120.

Almost surely, 2^21423302210 is an apocalyptic number.

21423302210 is a deficient number, since it is larger than the sum of its proper divisors (17138641786).

21423302210 is a wasteful number, since it uses less digits than its factorization.

21423302210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142330228.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21423302210 its reverse (1220332412), we get a palindrome (22643634622).

The spelling of 21423302210 in words is "twenty-one billion, four hundred twenty-three million, three hundred two thousand, two hundred ten".