21310353206 has 8 divisors (see below), whose sum is σ = 32108873664. Its totient is φ = 10607395320.

The previous prime is 21310353173. The next prime is 21310353209. The reversal of 21310353206 is 60235301312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310353209) by changing a digit.

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, 23890085 + ... + 23890976.

It is an arithmetic number, because the mean of its divisors is an integer number (4013609208).

Almost surely, 2^21310353206 is an apocalyptic number.

21310353206 is a deficient number, since it is larger than the sum of its proper divisors (10798520458).

21310353206 is a wasteful number, since it uses less digits than its factorization.

21310353206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47781286.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 21310353206 its reverse (60235301312), we get a palindrome (81545654518).

The spelling of 21310353206 in words is "twenty-one billion, three hundred ten million, three hundred fifty-three thousand, two hundred six".