21060252206 has 8 divisors (see below), whose sum is σ = 36103289520. Its totient is φ = 9025822368.

The previous prime is 21060252203. The next prime is 21060252211. The reversal of 21060252206 is 60225206012.

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 (21060252203) 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, 752151851 + ... + 752151878.

It is an arithmetic number, because the mean of its divisors is an integer number (4512911190).

Almost surely, 2^21060252206 is an apocalyptic number.

21060252206 is a deficient number, since it is larger than the sum of its proper divisors (15043037314).

21060252206 is a wasteful number, since it uses less digits than its factorization.

21060252206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504303738.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 21060252206 its reverse (60225206012), we get a palindrome (81285458218).

The spelling of 21060252206 in words is "twenty-one billion, sixty million, two hundred fifty-two thousand, two hundred six".