21300023210 has 8 divisors (see below), whose sum is σ = 38340041796. Its totient is φ = 8520009280.

The previous prime is 21300023209. The next prime is 21300023281. The reversal of 21300023210 is 1232000312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21201398449 + 98624761 = 145607^2 + 9931^2 .

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, 1065001151 + ... + 1065001170.

Almost surely, 2^21300023210 is an apocalyptic number.

21300023210 is a deficient number, since it is larger than the sum of its proper divisors (17040018586).

21300023210 is a wasteful number, since it uses less digits than its factorization.

21300023210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130002328.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21300023210 its reverse (1232000312), we get a palindrome (22532023522).

The spelling of 21300023210 in words is "twenty-one billion, three hundred million, twenty-three thousand, two hundred ten".