21855822914 has 32 divisors (see below), whose sum is σ = 36279517680. Its totient is φ = 9828016128.

The previous prime is 21855822881. The next prime is 21855822953. The reversal of 21855822914 is 41922855812.

It can be written as a sum of positive squares in 8 ways, for example, as 11005059025 + 10850763889 = 104905^2 + 104167^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18617 + ... + 209900.

Almost surely, 2^21855822914 is an apocalyptic number.

21855822914 is a deficient number, since it is larger than the sum of its proper divisors (14423694766).

21855822914 is a wasteful number, since it uses less digits than its factorization.

21855822914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228662.

The product of its digits is 460800, while the sum is 47.

The spelling of 21855822914 in words is "twenty-one billion, eight hundred fifty-five million, eight hundred twenty-two thousand, nine hundred fourteen".