21114850066 has 4 divisors (see below), whose sum is σ = 31672275102. Its totient is φ = 10557425032.

The previous prime is 21114850049. The next prime is 21114850069. The reversal of 21114850066 is 66005841112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10664899441 + 10449950625 = 103271^2 + 102225^2 .

It is not an unprimeable number, because it can be changed into a prime (21114850069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278712515 + ... + 5278712518.

Almost surely, 2^21114850066 is an apocalyptic number.

21114850066 is a deficient number, since it is larger than the sum of its proper divisors (10557425036).

21114850066 is a wasteful number, since it uses less digits than its factorization.

21114850066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10557425035.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 21114850066 in words is "twenty-one billion, one hundred fourteen million, eight hundred fifty thousand, sixty-six".