21354550472266 has 16 divisors (see below), whose sum is σ = 35516659207968. Its totient is φ = 9547489033200.

The previous prime is 21354550472261. The next prime is 21354550472267. The reversal of 21354550472266 is 66227405545312.

It is not an unprimeable number, because it can be changed into a prime (21354550472261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7956239520 + ... + 7956242203.

It is an arithmetic number, because the mean of its divisors is an integer number (2219791200498).

Almost surely, 2^{21354550472266} is an apocalyptic number.

21354550472266 is a deficient number, since it is larger than the sum of its proper divisors (14162108735702).

21354550472266 is a wasteful number, since it uses less digits than its factorization.

21354550472266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15912481797.

The product of its (nonzero) digits is 12096000, while the sum is 52.

The spelling of 21354550472266 in words is "twenty-one trillion, three hundred fifty-four billion, five hundred fifty million, four hundred seventy-two thousand, two hundred sixty-six".