21353350206 has 16 divisors (see below), whose sum is σ = 42709002624. Its totient is φ = 7117399704.

The previous prime is 21353350199. The next prime is 21353350211. The reversal of 21353350206 is 60205335312.

It is a congruent number.

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, 39321 + ... + 210363.

It is an arithmetic number, because the mean of its divisors is an integer number (2669312664).

Almost surely, 2^21353350206 is an apocalyptic number.

21353350206 is an abundant number, since it is smaller than the sum of its proper divisors (21355652418).

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

21353350206 is a wasteful number, since it uses less digits than its factorization.

21353350206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191855.

The product of its (nonzero) digits is 16200, while the sum is 30.

Adding to 21353350206 its reverse (60205335312), we get a palindrome (81558685518).

The spelling of 21353350206 in words is "twenty-one billion, three hundred fifty-three million, three hundred fifty thousand, two hundred six".