21226000206 has 8 divisors (see below), whose sum is σ = 42452000424. Its totient is φ = 7075333400.

The previous prime is 21226000193. The next prime is 21226000231. The reversal of 21226000206 is 60200062212.

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

21226000206 is an admirable number.

It is a super-2 number, since 2×21226000206² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1768833345 + ... + 1768833356.

It is an arithmetic number, because the mean of its divisors is an integer number (5306500053).

Almost surely, 2^21226000206 is an apocalyptic number.

21226000206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21226000206 is a wasteful number, since it uses less digits than its factorization.

21226000206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537666706.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21226000206 its reverse (60200062212), we get a palindrome (81426062418).

The spelling of 21226000206 in words is "twenty-one billion, two hundred twenty-six million, two hundred six", and thus it is an aban number.